Hand and wrist imaging using a low-field dedicated MRI system

Summary Purpose of this study was to evaluate the diagnostic value of a low field dedicated MRI system in hand and wrist imaging. All 308 exams of the hand and wrist, that were performed on a low-field dedicated MRI system (Artoscan, Esaote Biomedica, Italy) in our institution in 1996, and high-field MRI exams performed in addition as part of the diagnostic work-up, were evaluated and correlated to final operative (n = 64) and histologic (n = 12) reports. 90 % of all low-field MRI scans stated a diagnosis according to clinical suspicion. In 62 % the clinical question was answered, and in 26 % additional pathologies were identified. An MR-diagnosis completely different from the clinical suspicion was stated in 2 %. High field exams contributed additional information in 6 of 36 patients. In 3 patients a tumor was not shown completely in the limited field-of-view of the dedicated low-field MRI-system. Frequency-selective fat-suppression pulse sequences and a better spatial resolution were the reasons for the additional information obtained in the other three patients. Low-field dedicated MR-imaging is a valuable method in the extensive work-up of the hand and wrist. Osseous, ligamentous and tendinous pathologies are well depicted. Large or infiltrative tumors should be referred to a high-field system.      

惊恐障碍临床特征及误诊分析

目的 :分析惊恐障碍的临床特征 ,探讨其误诊原因。方法 :回顾性分析惊恐障碍 78例在精神科确诊前的临床资料。结果 :全部多次误诊为躯体疾病 ,尤其易误诊为心血管疾病。误诊时间 1.5～ 5 6个月 ,平均 ( 9.6 5± 13.2 1)个月。结论 :惊恐障碍极易误诊 ,综合医院应提高临床医生对惊恐障碍的认识以减少误诊率。     

18F-FDG hPET/CT显像诊断结直肠癌术后复发转移

目的 评价^18F-FDG hPET／CT代谢显像对结直肠癌患者术后复发转移的诊断价值。方法 对81例结直肠癌术后临床可疑肿瘤复发或转移的患者采用GEHAWKEYE符合线路SPECT进行^18F-FDG显像，获得经X线衰减校正后的三维断层图像，由计算机完成各断层图像的融合，以目测法进行诊断分析，并与CT、病理学检查、临床随访作出的最后诊断进行对比。结果 ^18F-FDG hPET／CT代谢显像对结直肠癌术后复发、转移诊断的灵敏度为93％（57／61），特异性为80％（16／20），阳性预测率为93％（57／61），阴性预测率为80％（16／20）；而常规CT对结直肠癌术后复发转移诊断的灵敏度、特异性、阳性预测值、阴性预测值分别为67％（37／55）、73％（19／26）、84％（37／44）、51％（19／37）；^18F-FDG hPET／CT代谢显像共检出病灶126个，65例相同视野hPET／CT代谢显像与诊断CT常规影像检查复发转移病灶检出数分别为91个和46个。结论 ^18F-FDG hPET／CT显像对结直肠癌术后复发转移的诊断价值优于CT；通过与同机定位CT图像融合可有效地对病变进行定性定位。     

腰椎间盘突出的CT诊断价值

腰椎间盘突出是骨科常见病。CT扫描能够显示间盘组织的直接影像，是诊断间盘病变的重要方法。本文对80例腰间盘突出进行分析，探讨CT对腰间盘突出的诊断价值。1 材料和方法 1.1一般资料 选用临床及CT表现均典型病例80例，男13例，女37例，年龄17岁-74岁，病程最短2d，最长22a,     

99Tcm-DMSA肾皮质显像诊断小儿肾发育不良

目的 探讨^99Tc^m—二巯基丁二酸(DMSA)肾皮质显像诊断小儿肾发育不良的价值。方法 疑为肾发育不良患儿29例，行常规^99Tc^m—DMSA肾皮质显像和腹部B超检查。图像分析：将发育不良肾分为0～4级。结果 ^99Tc^m—DMSA肾皮质显像示29例患儿中24例为单侧肾发育不良，其中11例1级，7例2级，6例3级，余5例患肾未显影为0级，结合其他：检查诊断为肾发育不良。患肾分肾功能为0～24．9％(平均6．3％)。29例患儿中24例患肾肾皮质显像诊断为肾发育不良，5例患肾未显影，由其他影像学方法确诊，诊断灵敏度为82．76％。29例中19例经手术治疗，病理检查证实为肾发育不良。结论 ^99Tc^m—DMSA肾皮质显像诊断肾发育不良灵敏度高、可靠，可确定发育不良肾部位和判断肾功能。     

Diagnostic Validity of Fecal Occult Blood Tests for Detecting Gastroenterological Cancers

In order to estimate the diagnostic validity of chemical fecal occult blood tests, i.e. orthotolidine (Shionogi A) and guajac (Shionogi B) slides for detecting cancers of the esophagus, stomach and colorectum, the authors followed up all the examinees (n=3,449) of comprehensive medical check-ups at the Center for Adult Diseases, Osaka, by means of record linkage to the Osaka Cancer Registry's files. Then, diagnostic validity was calculated based on the results of two years' follow-up. Sensitivity for the respective cancers was 20.0%, 11.8% and 62.5% for Shionogi A, and 20.0%, 5.9% and 43.8% for Shionogi B slides. Likelihood ratio for the respective cancers was 1.4, 0.8 and 4.5 for Shionogi A, and 3.3, 1.0 and 7.5 for Shionogi B. Specificity was analogous among the three cancer sites, being 86% for Shionogi A and 94% for Shionogi B. These results suggest that the diagnostic validity of chemical occult blood tests for detecting cancers of the esophagus and the stomach is very poor, and therefore imply that close examinations of these sites for screening positives is unnecessary in mass screenings for colorectal cancer.     

Staging-laparoscopy

Summary. The so-called extended diagnostic laparoscopy (EDL) facilitates the comprehensive exploration of the abdominal cavity, thus improving the precision of the pretherapeutic tumor staging in gastrointestinal malignancies. EDL comprises visual inspection with a specific preparation of all relevant sites, laparoscopic sonography and retrieval of samples for biopsy and cytology. Additional relevant therapeutic information was obtained through EDL in 40.5 % of gastric cancer patients. EDL could be of similar importance for diagnosing esophageal, hepatobiliary and pancreatic malignancies.      

不典型性脑膜瘤52例CT诊断分析

回顾性分析了22例少见部位的脑膜瘤，22例CT表现不典型及8例CT误诊脑膜瘤的CT表现，以确定脑膜瘤不典型表现与CT误诊的关系。结果显示脑膜瘤的CT误诊多数缘于经验不足与疏忽，少数为极不典型表现所致。若检查全面、阅片仔细．术前CT定性率可由90％提高至96．25％。     

Limites et dangers des DSM

The publication of the DSM-III rating scale in 1980 marked a definite turning point in the development of modern psychiatry. For those responsible for elaborating it, it appeared to have resulted in psychiatry being accepted as a science. However, this was at the expense of eliminating the subjective aspect, both that of the patient and that of the clinical practitioner. As a result of this, it was possible to utilize a common language which permitted high inter-scoring diagnostic accuracy. The success of the DMS-III and IV is based on their affinity with scientific ideals, and with their association with clinical medication. In focusing on target symptoms devoid of all dynamism, they implicitly relate them to bodily dysfunctions. Twenty years after the introduction of this approach presented as being atheoretical, its main justification, i.e. diagnostic accuracy, has been shown to be ill-founded, while the problems of diagnostic validity are eluded. The DSM scales have relegated mental disorders to being infinitized, and the pursuit of this approach could eventually lead to treatment by computerized psychiatry. These rating scales also lead to an impoverishment of clinical consultations; they do not take into account the possible reticence of the patient; and they generate implicit normative ideals. Even amongst their proponents, certain individuals are beginning to see that they could constitute a serious disadvantage to the progress of psychiatry.