所以，就常规或更频繁的CT检查而言，对人体有害，比如对造血系统，对局部敏感组织等，但归结到致癌方面...
where an imaging stress test or invasive coronary angiography is being deferred unless absolutely necessary; the ACC defines high-risk surgery as emergent operations, especially in the elderly, aortic and other major vascular surgeries, peripheral vascular surgeries, and anticipated prolonged surgical proce...
In their retrospective study of 648 adults with Crohn's disease (CD) between 2001-2009, Kerner et al1 evaluated abdomen/pelvis computed tomography (APCT) utilization trends and, as an outcome of interest, identified CT findings warranting urgent care in CD patients. Using ICD-9 codes for CD...
We did not include radiation doses from other common medical exposures, such as plain radiographs, CT of the chest, and CT of the abdomen, in our analyses. Their exclusion is unlikely to have introduced major bias, because the radiation exposure to the head from such scans is typically ...
If the arms cannot be moved out of the scanned volume, placing them on top of the abdomen should reduce noise relative to placing them at the sides. Similarly, large breasts should be constrained in the front of the thorax rather than on both sides in thoracic and cardiac CT. This is ...
结果两期扫描中,恶性占位病变的两期NIC、静脉期曲线斜率及ICD均显著高于良性占位病变(动、静脉期恶性占位病变组NICap:0.180±0.051、NICvp:0.463±0.086、1.696±0.475,ICD:0.284±0.071;良性占位病变组NICap:0.123±0.062、NICvp:0.290±0.119、1.169±0.582,ICD:0.166±0.073,),但动脉期良恶性肺占位病变曲线斜率差异...
The examinations were of the brain/skull (56.9%), chest (23.1%), sinus and/or middle ear (11.7%), abdomen and/or pelvis (9.1%), cervical region (3.0%), limbs (1.7%), and spine (1.4%) (one CT scan could have explored several body parts). For the overall study period (1-year ...
Kalra MK, Maher MM, Sahani DV et al (2003) Low-dose CT of the abdomen: Evaluation of image improvement with use of noise reduction filters pilot study. Radiology 228:251–256 Article PubMed Google Scholar Hara AK, Paden RG, Silva AC, Kujak JL, Lawder HJ, Pavlicek W (2009) Iterative...
I used logistic regression to assess whether repetitive CTs (鈮 2) for head, abdomen, thorax and other body regions were associated with age group and year of admission for MVC patients. I adjusted the estimates for gender, ethnicity, insurance status, mechanism and severity of injury, ...