تقنية جديدة قد تخفض جرعة الإشعاع بنسبة 50٪ -60٪ للتنظير الفلورسكبي في حالات القسطرة القلبيه الأطفال.
This study was conducted to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement.
Measurements of lung volume are useful for diagnosing and stratifying lung diseases. Moreover, the lung volume can help predict postoperative lung function in patients with chronic lung diseases who are considering lung transplantation or lung volume reduction surgery.
The average medical radiation effective dose to the U.S. population in 2006 was estimated at approximately 3.0 mSv, an increase of 600% in a single generation. Computed tomography (CT) alone accounts for approximately half of this medical radiation dose. Ongoing advances suggest that CT will continue to be the most important contributor, by far, to medical doses in the United States. The use of ionizing radiation in medical imaging, including CT, provides valuable diagnostic information that undoubtedly benefits many patients. Exposure to radiation, however, is currently believed to carry a small, but nonzero, risk.