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101.
Edelman RR; Wedeen VJ; Davis KR; Widder D; Hahn P; Shoukimas G; Brady TJ 《Radiology》1986,161(3):779-783
A new technique is described that allows for the creation of pure pulsatile flow magnetic resonance (MR) images in a single acquisition. Five to 16 electrocardiographically gated images spanning the entire cardiac cycle are obtained with use of a gradient-echo pulse sequence. The section can be varied from 4 mm thick to full thickness projection. Taken singly, each image provides direct assessment of flow direction and velocity. Subtraction of image pairs eliminates signal detected from stationary protons, producing images of pulsatile flow. In this study the technique was used to image the flow of cerebrospinal fluid (CSF) in healthy subjects and in one patient with syringohydromyelia. The data suggest that multiphasic MR imaging provides a powerful means for the noninvasive assessment of CSF pulsatile flow dynamics and may have potential clinical application for the investigation of a variety of abnormalities such as normal pressure hydrocephalus, syrinx, and spinal block. 相似文献
102.
TJ Goehl 《Environmental health perspectives》2002,110(4):A174
103.
104.
105.
Cerebral vasculitis: MR imaging and angiographic correlation 总被引:20,自引:0,他引:20
106.
Meuli RA; Wedeen VJ; Geller SC; Edelman RR; Frank LR; Brady TJ; Rosen BR 《Radiology》1986,159(2):411-418
We report the first clinical experience with a new method for projective imaging of blood vessels (angiography) using magnetic resonance. Vascular contrast is produced noninvasively by the phase response of moving protons. Diastolic and systolic gated images produce, respectively, flow signal and flow void; the difference image is a map of the pulsatile flow: an arteriogram. Preliminary studies are presented of the lower extremities of one healthy volunteer and four patients (one each with occlusive disease, soft-tissue tumor, arteriovenous malformation, and venous femoral-popliteal graft). Patient data are compared with accompanying conventional arteriograms, and the new method is discussed. 相似文献
107.
108.
Liu JM; Chu HC; Chin YH; Chen YM; Hsieh RK; Chiou TJ; Whang-Peng J 《Japanese journal of clinical oncology》1997,27(1):37-41
The aim of this study was to ascertain the prevalence of alternative
medicine consumption in Chinese cancer patients on active conventional
treatment. A cross sectional survey of 100 consecutive advanced cancer
patients admitted to a cancer clinical trial referral unit were personally
interviewed by their assigned oncology research nurse using a specially
designed questionnaire. The results showed that 64% of our patients used
indigenous Chinese medication. In all age groups except the over-70s (P =
0.043), > 50% took such medication, more female (76%) than male (57.6%)
patients (P = 0.323). Patients of all educational levels (P = 0.062) and
religious backgrounds (P = 0.08) consumed alternative medicines. Duration
of alternative medication consumption was less than three months in 50% of
patients, with costs between US$40 and 2000/month for 70% of patients.
Reasons cited for alternative medication consumption was hope that it might
be of some benefit to their well being or disease control, and maybe even
result in a miracle cure. Sources of advice on medication were mostly from
strangers (by word of mouth), family, friends, the media, and infrequently
from qualified professional Chinese doctors. Reasons for discontinuing such
treatment were mostly given as lack of positive effect. In conclusion,
Chinese cancer patients, willingly, rampantly and non-selectively seek out
and consume alternative medications, with almost total ignorance of the
medication consumed, oblivious to any potential side effects, and with
little subjective benefit.
相似文献
109.
Spatial variation of T2 in human articular cartilage 总被引:20,自引:0,他引:20
110.