Radiation medicine
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Comparative Study
Utility of cine MR urography of the urinary tract and comparison with static MR urography.
MR urography using heavily T2-weighted images can depict the urinary tract without the need for contrast medium. However, this technique has potential problems with regard to evaluating the non-dilated ureter. We compared the efficacy of cine MR urography (C-MRU) with static MR urography (S-MRU). ⋯ C-MRU can improve the certainty of existence of urinary stenosis, and may be useful in excluding suspected stenoses in normal or undilated ureters.
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To examine a new way of body diffusion weighted imaging (DWI) using the short TI inversion recovery-echo planar imaging (STIR-EPI) sequence and free breathing scanning (diffusion weighted whole body imaging with background body signal suppression; DWIBS) to obtain three-dimensional displays. ⋯ Three-dimensional DWIBS can be obtained with this technique, which may allow us to screen for malignancies in the whole body.
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Review Case Reports
Iatrogenic venous air embolism caused by CT injector--from a risk management point of view.
An iatrogenic venous air embolism caused by computed tomography (CT) injector occurred in a 74-year-old man undergoing abdominal-pelvic CT for evaluation of an abdominal aortic aneurysm (AAA). During the initial inspection scan of the thoracic part, a large amount of air was detected in the right ventricle, but no contrast medium was noted in the aorta. Surface oxygen was given immediately, and the patient was placed in the left lateral decubitus position on the CT bed. ⋯ CT revealed no air in the brain or pulmonary vein, and he was returned to his room 55 minutes after the incident. There were no complications during a six-month follow-up period. The importance of daily risk management and immediate proper after care to prevent such accidents was reconfirmed.
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We report the case of a 65-year-old man with blunt abdominal trauma following a fall from a three-meter-high roof. Contrast-enhanced abdominal computed tomography (CT) obtained in early phase showed intense contrast enhancement in the urinary tract as dense as artery. ⋯ In cases of blunt abdominal trauma, contrast-enhanced CT should be obtained in the early phase to diagnose this disorder. When the diagnosis is made, prompt treatment should be initiated.
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Comparative Study
Study of arsenic trioxide-induced vascular shutdown and enhancement with radiation in solid tumor.
Arsenic trioxide (ATO) has been reported to be an effective chemotherapeutic agent for acute promyelocytic leukemia (APL), and, recently, anti-tumor effect has been demonstrated in solid tumors. However, little is known about the mechanism of action of the ATO effect on solid tumor. We investigated the anti-vascular effect of ATO and the potential of combining ATO with radiation therapy. ⋯ The results suggest that ATO and radiation can enhance the radiosensitivity of solid tumor.