Acid and Alkaline Phosphatase Activity in Bone Following Intense Magnetic Field Irradiation of Short Duration

Summary

Consideration of the biological effects of electromagnetic radiation is particularly important with regard to bone metabolism. Magnetic fields have been applied to the treatment of bone fractures, and similar fields are employed in the visualization of skeletal structures through magnetic resonance imaging (MRI). The present investigation addressed the effect of MRI-intensity (1 Tesla) magnetic fields on enzymatic indices of bone metabolism. Mice were exposed to intense static (direct current) magnetic fields for 30 min on each of 10 successive days. After this exposure regimen the primary spongiosum of the humerus was assayed for acid and alkaline phosphatase activity. No significant difference was detected in tissue levels of either enzyme in bones from control (n = 10), sham-exposed (n = 10), and magnetic field-exposed (n = 10) mice. These results suggested that the effects of magnetic field irradiation do not appear to involve modification of the activities of regulatory enzymes in bone.     

Can 50Hz magnetic fields alter iron metabolism and induce anaemia?

Purpose : Some changes in tissue iron concentration have been reported in animals exposed to electromagnetic fields. In other studies, variations in the haemoglobin level were occasionally observed. In the present experiment, the effects of exposing a rat to a 50 Hz magnetic field (MF) were therefore investigated for the possible induction of anaemia due to changes in iron metabolism. Materials and methods : Male Brown Norway rats (n =225) were exposed to a sinusoidal 50 Hz MF of 500muT for 15 weeks. Haematological parameters, differential bone marrow cell counts and sideroblasts were investigated. Blood parameters of iron metabolism were measured. Iron concentration and total iron content were also determined in the spleen and liver, to assess iron storage in these organs. Results : Significant differences between the exposed and control rat were only detected for iron storage in the spleen, and for the percentage of bone marrow cells of the red cell lineage. Conclusion : The changes observed were not associated with anaemia during the 15 weeks of MF exposure. However, the decrease in bone marrow cells of the red cell lineage and the changes in iron storage detected at the end of the experiment did not allow the possibility to be ruled out that exposure to 50Hz MFs may induced delayed biological effects.     

Can 50 Hz magnetic fields alter iron metabolism and induce anaemia?

PURPOSE. Some changes in tissue iron concentration have been reported in animals exposed to electromagnetic fields. In other studies, variations in the haemoglobin level were occasionally observed. In the present experiment, the effects of exposing a rat to a 50 Hz magnetic field (MF) were therefore investigated for the possible induction of anaemia due to changes in iron metabolism. MATERIALS AND METHODS: Male Brown Norway rats (n=225) were exposed to a sinusoidal 50 Hz MF of 500 microT for 15 weeks. Haematological parameters, differential bone marrow cell counts and sideroblasts were investigated. Blood parameters of iron metabolism were measured. Iron concentration and total iron content were also determined in the spleen and liver, to assess iron storage in these organs. RESULTS: Significant differences between the exposed and control rat were only detected for iron storage in the spleen, and for the percentage of bone marrow cells of the red cell lineage. CONCLUSION: The changes observed were not associated with anaemia during the 15 weeks of MF exposure. However, the decrease in bone marrow cells of the red cell lineage and the changes in iron storage detected at the end of the experiment did not allow the possibility to be ruled out that exposure to 50 Hz MFs may induced delayed biological effects.     

The effects of a walking exercise program on fall-related fitness, bone metabolism, and fall-related psychological factors in elderly women

The purpose of this study was to determine the effects of a 3-month walking exercise program with ankle weights on fall-related fitness, bone metabolism, and fall-related psychological factors. Fall-related fitness was determined from strength, balance, agility, aerobic endurance, muscle mass, and fat mass measures. Bone metabolism was measured using bone density, hormones, and biochemical markers. Fall-related psychological factors included fear of falling and falls efficacy. A 2 × 2 factorial with repeated measures design was used. All subjects were community-dwelling elderly women who volunteered to participate, and randomly were assigned to either an exercise group (n = 11) or a control group (n = 10). Results revealed significant changes in upper body strength, leg strength, aerobic endurance, and body composition. Additionally, hormones and biochemical markers changed significantly over time. Trunk fat and fear of falling changed differently among the two groups. In conclusion, this study suggests that a 3-month walking exercise program with ankle weights may have positive effects on fall-related fitness, bone metabolism, and fall-related psychological factors.     

Reactivation in post-traumatic chronic osteomyelitis: ultrasonographic findings.

OBJECTIVE: To describe the ultrasound (US) features of reactivation in post-traumatic chronic osteomyelitis in adults. METHODS: Twelve patients with clinical suspicion of reactivation of chronic osteomyelitis, secondary to trauma, surgery, and who were investigated with US were selected for the study. The following US features were assessed: periosseous fluid collection, bone changes (periosteal reactions, cortical irregularity, callus, sequestrum and cloaca) and soft-tissue changes (cellulitis and sinus tracts). US findings were correlated with plain radiography (n = 11), computed tomography (n = 3) and magnetic resonance imaging (n = 2). RESULTS: US detected fluid collections in all patients (12 periosseous and 3 in soft tissues), bone changes in 10 and sinus tracts and cellulitis in 5 patients each. Bone changes detected were cortical irregularity (n = 10), discontinuity of cortex (n = 7), sequestrum (n = 2), callus (n = 2), periosteal reaction (n = 1) and cloaca (n = 1). Cellulitis was seen in 5 patients and sinus tracts in 5. Reactivation was confirmed at surgery in all patients. CONCLUSION: US is a reliable noninvasive imaging modality for the diagnosis of reactivation of post-traumatic chronic osteomyelitis in adults.     

Allogenic bone graft viability after hip revision arthroplasty assessed by dynamic [18F]fluoride ion positron emission tomography.

The biological fate of allogenic bone grafts in the acetabular cavity and their metabolic activity after acetabular augmentation is uncertain but is most important for the stability of hip implants after hip revision arthroplasty. The aim of this study was to quantify regional bone metabolism after hip replacement operations. Dynamic [18F]fluoride ion positron emission tomography (PET) was used to investigate the metabolic activity of acetabular allogenic bone grafts and genuine bone, either 3-6 weeks (short-term group, n = 9) or 5 months to 9 years (long-term group, n = 10) after hip revision arthroplasty. Applying a three-compartment model, the fluoride influx constant was calculated from individually fitted rate constants (Knlf) and by Patlak graphical analysis (Kpat). The results were compared with genuine cancellous and cortical acetabular bone of contralateral hips without surgical trauma (n = 7). In genuine cortical bone, Knlf was significantly increased in short- (+140.9%) and long-term (+100.0%) groups compared with contralateral hips. Allogenic bone grafts were characterised by a significantly increased Knlf in the short-term group (+190.9%) compared with contralateral hips, but decreased almost to the baseline levels of contralateral hips (+45.5%) in the long-term. Values of Knlf cor-related with the rate constant K1 in genuine (r = 0.89, P<0.001) and allogenic bone regions (r = 0.79, P<0.001), indicating a coupling between bone blood flow and bone metabolism in genuine bone as well as allogenic bone grafts. Kpat values were highly correlated with Knlf measurements in all regions. In conclusion, [18F]fluoride ion PET revealed the presence of an increased host bone formation in allogenic bone grafts early after hip revision arthroplasty. In contrast to genuine cortical bone, allogenic bone graft metabolism decreased over time, possibly due to a reduced ability to respond to the same extent as genuine bone to elevated metabolic demands after surgery.     

Effects of static magnetic fields on cognition, vital signs, and sensory perception: a meta-analysis

To evaluate whether cognitive processes, sensory perception, and vital signs might be influenced by static magnetic fields in magnetic resonance imaging (MRI), which could pose a risk for health personnel and patients, we conducted a meta-analysis of studies that examined effects of static magnetic fields. Studies covering the time from 1992 to 2007 were selected. Cohen's d effects sizes were used and combined in different categories of neuropsychology (reaction time, visual processing, eye-hand coordination, and working memory). Additionally, effects of static magnetic fields on sensory perception and vital signs were analyzed. In the category "neuropsychology," only effects on the visual system were homogeneous, showing a statistically significant impairment as a result of exposure to static magnetic fields (d = -0.415). Vital signs were not affected and effects on sensory perceptions included an increase of dizziness and vertigo, primarily caused by movement during static magnetic field gradient exposures. The number of studies dealing with this topic is very small and the experimental set-up of some of the analyzed studies makes it difficult to accurately determine the effects of static magnetic fields by themselves, excluding nonspecific factors. The implications of these results for MRI lead to suggestions for improvement in research designs.     

Ultrasmall superparamagnetic iron-oxide-enhanced MR imaging of normal bone marrow in rodents: original research original research

RATIONALE AND OBJECTIVES: The objective is to compare three different ultrasmall superparamagnetic iron oxides (USPIOs) for magnetic resonance (MR) imaging of normal bone marrow in rodents. MATERIALS AND METHODS: Femoral bone marrow in 18 Sprague-Dawley rats was examined by using MR imaging before and up to 2 and 24 hours postinjection (PI) of 200 mumol of Fe/kg of SHU555C (n = 6), ferumoxtran-10 (n = 6), or ferumoxytol (n = 6), using T1-weighted (50 ms/1.7 ms/60 degrees = repetition time [TR]/echo time [TE]/flip angle) and T2*-weighted (100 ms/15 ms/38 degrees = TR/TE/flip angle) three-dimensional spoiled gradient recalled echo sequences. USPIO-induced bone marrow was evaluated qualitatively and quantified as signal-to-noise ratio (SNR) and change in signal intensity (DeltaSI) values. A mixed-effect model was fitted to the SNR and DeltaSI values, and differences among USPIOs were tested for significance by using F tests. RESULTS: At 2 hours PI, all three USPIOs showed marked positive signal enhancement on T1-weighted images and a corresponding marked signal loss on T2*-weighted images. At 24 hours PI, the T1 effect of all three USPIOs disappeared, whereas T2*-weighted images showed persistent signal loss on SHU555C and ferumoxytol-enhanced MR images, but not ferumoxtran-10-enhanced MR images. Corresponding SNR and DeltaSI values on T2*-weighted MR images at 24 hours PI were significantly different from baseline for SHU555C and ferumoxytol, but not ferumoxtran-10. CONCLUSION: All three USPIO contrast agents, ferumoxtran-10, ferumoxytol, and SHU555C, can be applied for MR imaging of bone marrow. Ferumoxtran-10 apparently reveals a different kinetic behavior in bone marrow than ferumoxytol and SHU555C.     

维生素K对尾悬吊大鼠骨代谢的影响

目的 探讨维生素K对模拟失重大鼠骨质的影响,为失重骨丢失的防护提供实验依据。方法 将SD雄性大鼠分为3组,自由对照组（FAC）,悬吊对照组（SC）,维生素K悬吊组（SVK）（50mg/kg weight/d),每组9只。每天灌胃给药,实验期为21d。观察维生素K对尾悬吊大鼠血清骨钙素（BGP）、骨生物力学、矿盐含量、一氧化氮（NO）含量及碱性碱酸酶（ALP）活性含量的影响。结果 与SC比较,SVK血清总BGP和结合型BGP,股骨和胫骨矿盐含量,股骨生物力学,胫骨ALP活性含量均显著增加;股骨干NO含量明显减少。结论 维生素K可改善尾悬吊大鼠的骨代谢和骨结构,减少骨丢失,提高骨生物力学性能,降低骨折危险度。     

Spaceflight alters bone mechanics and modeling drifts in growing rats

BACKGROUND: Alterations in bone metabolism may be a particularly serious consequence of spaceflight and a major obstacle to long-term space exploration. The effects of spaceflight on bone mechanics are unclear. This study examined the effects of spaceflight on bone mechanics in a growing rat model during a 17-d mission aboard the space shuttle (STS-78). METHODS: There were 18 rats that were divided into 3 experimental groups: flight rats (n = 6), ground-based control rats housed in an animal enclosure module (AEM, n = 6), and ground-based control rats housed in standard vivarium caging (n = 6). At the conclusion of the mission, rat femurs were tested in three-point bending followed by static and dynamic bone histomorphometry. RESULTS: Maximum stress was unaffected by spaceflight, but flexural rigidity was significantly decreased in flight animals. Much of the decrease appeared to be the result of decreases in tissue properties (elastic modulus) rather than structural changes within the bone. No significant differences in cortical bone mass or geometry were observed. In contrast, endocortical resorption was significantly decreased in flight rats accompanied by a nonsignificant decrease in periosteal bone formation, suggesting alterations in bone modeling drifts during spaceflight. For nearly all measured indices, ground-based AEM rats displayed values intermediate to flight and ground-based vivarium rats. CONCLUSIONS: Spaceflight can impair tissue properties in femoral cortical bone during growth without significant decreases in bone mass or geometry.     

Dynamic contrast-enhanced MR imaging findings of bone metastasis in patients with prostate cancer

AIM:To evaluate the dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) findings of bone metastasis in prostate cancer patients.METHODS:Sixteen men with a diagnosis of metastatic prostate cancer to bones were examined with DCE-MRI at 1.5 Tesla.The mean contrast agent concentration vs time curves for bone metastasis and normal bone were calculated and K trans and ve values were estimated and compared.RESULTS:An early significant enhancement (wash-out:n=6,plateau:n=8 and persistent:n=2) was detected in all bone metastases (n=16).Bone metastasis from prostate cancer showed significant enhancementand high K trans and ve values compared to normal bone which does not enhance in the elderly population.The mean K trans was 0.101/mmiinn and 0.0051/mmiinn (P < 0.001),the mean ve was 0.141 and 0.0038 (P < 0.001),for bone metastases and normal bone,respectively.     

不同运动强度对糖尿病大鼠血清骨代谢生化指标的影响

目的:探讨不同运动强度对糖尿病大鼠血清骨代谢生化指标的影响。方法:以87只雄性SD大鼠为研究对象,通过6周高脂高糖膳食并注射链脲佐菌素建立糖尿病模型后,随机取43只分为糖尿病安静对照组,糖尿病运动1组、2组和3组。运动组每天运动1小时,每周5天,运动强度分别为10m/min、15m/min、20m/min。实验6周后检测血糖、糖化血清蛋白与胰岛素等糖代谢相关指标以及血清骨代谢生化指标如骨钙素、碱性磷酸酶、钙和磷。结果:与糖尿病安静组相比,各糖尿病运动组空腹血糖、糖化血清蛋白和胰岛素抵抗指数降低,其中以糖尿病运动1组和运动2组的下降具有统计学意义(P<0.05,P<0.01),而胰岛素水平升高,其中以糖尿病运动3组具有统计学意义(P>0.05);同时,糖尿病运动1组和运动2组血清骨钙素水平显著升高(P<0.01),而血清碱性磷酸酶、钙未见显著性变化(P>0.05),糖尿病运动2组和3组血磷显著升高(P<0.05)。结论:低、中强度运动可较好控制糖尿病大鼠血糖水平及提高血清骨钙素水平,从而改善糖尿病骨代谢状况,有利于防治糖尿病性骨质疏松。     

Characteristics of local human skeleton reactions to microgravity and drug treatment of osteoporosis in clinic

Analysis of the results of long-term investigations of bones in cosmonauts flown on the orbital station MIR and International space station (n = 80) was performed. Theoretically predicted (evolutionary predefined) change in mass of different skeleton bones was found to correlate (r = 0.904) with position relatively the Earth's gravity vector. Vector dependence of bone loss ensues from local specificity of expression of bone metabolism genes which reflects mechanic prehistory of skeleton structures in the evolution of Homo erectus. Genetic polymorphism is accountable for high individual variability of bone loss attested by the dependence of bone loss rate on polymorphism of certain bone metabolism markers. Parameters of one and the other orbital vehicle did not modulate individual-specific stability of the bone loss ratio in different segments of the skeleton. This fact is considered as a phenotype fingerprint of local metabolism in the form of a locus-unique spatial structure of distribution of noncollagenous proteins responsible for position regulation of endosteal metabolism. Drug treatment of osteoporosis (n = 107) evidences that recovery rate depends on bone location; the most likely reason is different effectiveness of local osteotrophic intervention into areas of bustling resorption.     

MRI of joint fluid in femoral head osteonecrosis

OBJECTIVE: To evaluate the relationship between joint fluid, intramedullary pressure (IMP), bone marrow edema, and stages of osteonecrosis of the femoral head (ONFH). MATERIAL AND METHODS: We reviewed the magnetic resonance (MR) images of 28 patients with 40 documented ONFHs. IMP was measured in 16 symptomatic hips. The amount of joint fluid was graded as 0 (no fluid), 1 (fluid <5 mm in width), or 2 (fluid > or = 5 mm in width) adjacent to the entire length of the femoral neck. Associated focal and diffuse bone marrow abnormalities were evaluated. A control group of 29 recruited individuals without symptoms related to hip disease were examined. Follow-up MR images were obtained in four patients (five affected hips) 6-10 months after core decompression. RESULTS:Of the 40 affected hips, the severity of ONFH was divided into stages 0 (n=4), I (n=28), and II (n=8 hips) on MR findings. The correlation of joint fluid to IMP and to the presence of bone marrow edema was poor. The amount of joint fluid correlated significantly with the stage of ONFH. None of the five affected hips showed decreased joint fluid on follow-up MR images. CONCLUSION:The amount of joint fluid correlates well with the stage of ONFH. The amount of joint fluid does not correlate with IMP or bone marrow edema.     

Dermal grafts of the temporomandibular joint: postoperative appearance on MR images

Complications may follow meniscectomy and placement of an allogenic implant in temporomandibular joint (TMJ) dysfunction. To characterize the anatomy of autogenous dermal grafts for repair and repositioning of the meniscus, the authors performed T1-weighted magnetic resonance (MR) imaging of 20 TMJs in 10 patients 6-23 months after surgery that was considered successful. MR imaging did not enable detection of the dermal grafts. Comparison of preoperative and postoperative MR images revealed little, if any, change in meniscal position. MR images of 20 menisci revealed anterior displacement (n = 11), normal position (n = 4), focal areas of increased signal intensity (n = 4), fragmentation (n = 2), and suboptimal visualization (n = 5). MR images of 20 condyles revealed normal features (n = 11), erosions (n = 2), early avascular necrosis (AVN) or subchondral cysts (n = 2), AVN (n = 3), an osteophyte (n = 1), and loss of bone (n = 2). One TMJ demonstrated increased soft tissue in the bilaminar zone.     

精脒对老龄小鼠股骨微结构的影响

目的 探讨精脒(Spermidine)对老龄小鼠股骨微结构的影响.方法 选取20只21月龄C57老龄小鼠随机分为对照组(Vehicle,n=10)和实验组(Spermidine,n=10),Spermidine组在饮水中按3 mmol/L的浓度加入Spermidine,干预时间为12周.每周测量各组小鼠的体重;实验结束...     

Increased sensitivity in detection of a porcine high-turnover osteopenia after total gastrectomy by dynamic 18F-fluoride ion PET and quantitative CT.

High-resolution (18)F-fluoride ion PET in combination with quantitative CT (QCT) allows the assessment of bone metabolism in relation to bone mass. This combined imaging approach was used to elucidate porcine bone metabolic changes after gastrectomy, which are frequently associated with osteopenia or osteomalacia. METHODS: Six months after total gastrectomy (n = 7) or sham operation (n = 6), bone blood flow and bone metabolic activity (K(i), K(flux)) were calculated from dynamic PET measurements from vertebral bodies and compared with corresponding QCT bone mineral density (BMD) measurements. RESULTS: Total gastrectomy resulted in a significant reduction of the BMD (-21%; P < 0.005), whereas 1,25-(OH)(2)-vitamin D, serum phosphate, and parathyroid hormone were significantly increased compared with that of sham-operated animals. Because of the significant increase of the rate constant k(3) (+325%; P < 0.05), describing chemisorption and incorporation of (18)F-fluoride onto or into the bone matrix, K(i) (+36%) and K(flux) (+37%) were significantly elevated after total gastrectomy compared with that of control animals (P < 0.01), whereas bone blood flow was not significantly different between groups. The normalization of K(i) and K(flux) values by the specific bone mass (K(i/BMD); K(flux/BMD)) largely increased the differences between groups (K(i/BMD), +74%; K(flux), +76%; P < 0.001). CONCLUSION: Dynamic (18)F-fluoride ion PET revealed that porcine bone loss after total gastrectomy is related to a high-turnover bone disease without significant changes in bone blood flow. In mini pigs, the increased bone metabolism is probably related to an elevated parathyroid hormone secretion, thus maintaining serum calcium homeostasis at the expense of the bone mineral content. Normalizing bone metabolic activity by the specific bone mass increases the sensitivity in the detection of osteopenic high-turnover bone diseases. Therefore, the combination of QCT and (18)F-fluoride ion PET seems to be the method of choice for the classification of metabolic bone diseases and for monitoring treatment effects quantitatively.     

Histopathological correlation to MRI findings during and after laser-induced thermotherapy in a pig pancreas model

RATIONALE AND OBJECTIVES: To investigate whether percutaneous laser-induced thermotherapy (LITT) with continuous magnetic resonance (MR) monitoring of thermal effects within the pancreas is feasible in a porcine model. METHODS: Laser applicators were placed in the pancreas of 15 female pigs. A temperature-sensitive (thermo--fast low-angle shot) sequence was used for continuous monitoring of thermal effects during LITT at 1.5 T. Follow-up MR images were acquired, the pigs were observed for 7 days, and then a pathological examination was performed after sacrifice. RESULTS: Continuous MR monitoring visualized thermal effects in pancreatic tissue and thermal damage of the spleen (n = 1), the left kidney (n = 1), and peripancreatic fat (n = 4) but missed the thermal damage of the duodenum (n = 2). Thermal-induced lesions (10--32-mm diameter) were clearly visualized on contrast-enhanced T1-weighted images. CONCLUSIONS: Laser-induced thermotherapy of pancreatic tissue was feasible in this porcine model, and online monitoring was practicable. Further studies are necessary to increase the accuracy of online MR imaging of thermal effects.     

Coupling of porcine bone blood flow and metabolism in high-turnover bone disease measured by [<Superscript>15</Superscript>O]H<Subscript>2</Subscript>O and [<Superscript>18</Superscript>F]fluoride ion positron emission tomography

Previously, we identified a parathyroid hormone-related high-turnover bone disease after gastrectomy in mini pigs. Dynamic [(18)F]fluoride ion positron emission tomography (PET) revealed that bone metabolism was significantly increased, but that bone blood flow derived from permeability-surface area product (PS product)-corrected K(1) values was not. Since bone blood flow and metabolism are coupled in normal bone tissues, we hypothesised that the capillary permeability and/or surface area might be altered in high-turnover bone disease. The "true" bone blood flow ( f(H2O)) was measured in vertebral bodies by dynamic [(15)O]H(2)O PET, followed by a 120-min dynamic [(18)F]fluoride ion PET study, 6 months after total gastrectomy (n=5) and compared with results in sham-operated animals (n=5). Estimates for bone blood flow based on PS-corrected K(1) values (f) and the net uptake of fluoride in bone tissue (K(i)), representing the bone metabolic activity, were calculated using standard compartmental modelling and non-linear fitting. Gastrectomy was followed by a significant elevation of K(i) and k(3) ( P<0.05), which was mainly caused by an increase of the fraction of bound tracer in tissue (P<0.01). In contrast, f(H2O), f, the single-pass extraction fraction of [(18)F]fluoride (E) and the volume of distribution (DV) of [(18)F]fluoride were not significantly different between groups. In both groups, a coupling of the mean f(H2O) and K(i) values was found, but the intercept with the y-axis was higher in high-turnover bone disease. It is concluded that in high-turnover bone disease following gastrectomy, the PS product for [(18)F]fluoride remains unchanged. Therefore, even in high-turnover bone diseases, [(18)F]fluoride ion PET can provide reliable blood flow estimates (f), as long as a proper PS product correction is applied. The increased bone metabolism in high-turnover bone disease after gastrectomy is mainly related to an up-regulation of the amount of ionic exchange of [(18)F]fluoride with the bone matrix, while tracer delivery remains unchanged.     

胸部腹外型侵袭性纤维瘤病的CT表现

目的：分析发生于胸部的腹外型侵袭性纤维瘤病的CT表现,提高对本病的诊断水平。方法：回顾性分析19例经手术病理证实的胸部侵袭性纤维瘤病患者的CT 表现。19例均行 CT 平扫,9例行增强扫描,1例行 CTA 检查。结果：19例共检出23个病灶,其中3例为多发病灶（发生于软组织1例、骨骼2例）。病变位于软组织15例共16个病灶（两侧和前胸壁8个、背部5个、肩部1个、腋窝1个）,位于骨骼4例共7个病灶（肋骨5个、胸肋关节1个、胸骨上段1个）。16个软组织肿块中呈类圆形或梭形13个,分叶形或不规则形3个;边界不清13个,边界清晰3个（其中2个有假包膜）;CT平扫表现为等或低密度肿块14个,囊实性肿块2个,3个病灶内可见钙化（分别呈点状、弧形和爆米花样）;增强扫描9例共10个病灶中,表现为轻度均匀强化2个,明显不均匀强化2个,边缘轻度强化1个,边缘明显强化2个,轻中度不均匀强化2个,多发小圆形轻中度环形强化1个;5个病灶可见肿瘤与骨质粘连伴骨质破坏。4例共7个骨骼病灶,CT 平扫6个表现为骨内软组织肿块、膨胀性骨质破坏（1个出现周缘硬化边）,1个表现为软组织肿块伴有局限性骨皮质压迫吸收;肿块呈较低密度3个,等或稍低密度3个,稍高密度1个;1例行增强扫描,肿瘤呈轻度～中度不均匀强化。结论：胸部侵袭性纤维瘤病的CT表现有一定特征性,CT对本病具有较高的诊断价值。