Computed tomography (CT) has had a massive impact on diagnostic radiology over the past few decades. Serious concerns exist because of increase in effective radiation dose associated with CT scans, which could pose significant health risks. In CT, can be estimated by Monte Carlo simulations. The aim study was to estimate and compare doses for from organ dose-based calculations using tissue weig...

Introduction Objective: This study aims to investigate the reduction of radiation dose in cerebral CT perfusion by lower low-tube current. Material and methods Two hundred patients, who underwent non-contrast computed tomography (CT) perfusion, were randomized into four groups according tube current contrast media (CM) concentration: group A (60 mAs, 320 mgI/ml), B 370 C (100 D mgI/ml). Among t...

In the radiological department, computed tomography (CT) scan process has become a greater radiation dosage that contributes to all medical X-ray treatments. Many studies throughout world have found CT accounts for just 5% of operations conducted yet 34% yearly exposures in Similarly, other 17% worldwide but 49% total doses Because diagnostic reference levels (DRLs) are one ways optimizing dose...

Computed tomography thoracic angiography studies were performed on five adult beagles using the bolus tracking (BT) technique and the test bolus (TB) technique, which were performed at least two weeks apart. For the BT technique, 2 mL/kg of 300 mgI/mL iodinated contrast agent was injected intravenously. Scans were initiated when the contrast in the aorta reached 150 Hounsfield units (HU). For t...

Background: In the past several years, emerging imaging techniques, such as computed tomography angiography (CTA), Doppler ultrasound, and magnetic resonance (MRI), have been used for investigating anatomy perfusion of perforator complexes. Preoperative CTA can provide explicit information on flaps, which not only helps surgeons to evaluate optimal design flaps with respect lateral circumflex f...

Background: High-resolution CT (HRCT) thorax has increase demand due to its advantage in diagnosing chronic respiratory diseases. The feasibility of matrix size with different tube voltage the HRCT protocol is unknown. Therefore, this study aimed compare effect sizes and on image quality radiation dose adult thorax. Methods: A Phantom experiment was performed, followed by...

AMAÇ: Bu çalışma ile amacımız ardışık toraks ve abdomen BT tetkiklerinde tarama uzunluğu değişkenliğini uzunluğunun radyasyon dozu parametreleri üzerine etkisini değerlendirmektir.GEREÇ VE YÖNTEM: Merkezimizde, Ocak 2018 Aralık tarihleri arasında aynı hastaya ait (n=85) (n=57) tetkikleri çalışmaya dahil edildi. Toraks tetkiklerinin % 39 (n=33)'u, 51 (n=29)'i kadındı. görüntü arşivleme iletişim ...

OBJECTIVES To investigate the feasibility of high-pitch CT pulmonary angiography (CTPA) in 3rd generation dual-source CT (DSCT) in unselected patients. METHODS Forty-seven patients with suspected pulmonary embolism underwent high-pitch CTPA on a 3rd generation dual-source CT scanner. CT dose index (CTDIvol) and dose length product (DLP) were obtained. Objective image quality was analyzed by c...

BACKGROUND AND PURPOSE CT guidance may improve precision for diagnostic and therapeutic spinal injections, but it can increase patient radiation dose. This study examined the impact of reducing tube current on patient radiation exposure and the technical success for these procedures, by using axial acquisitions for short scan lengths and eliminating nonessential imaging. MATERIALS AND METHODS...

BACKGROUND Dual energy CT (DECT) has proven its potential in oncological imaging. Considering the repeated follow-up examinations, radiation dose should not exceed conventional single energy CT (SECT). Comparison studies on the same scanner with a large number of patients, considering patient geometries and image quality, and exploiting full potential of SECT dose reduction are rare. Purpose of...