Low Dose CT

Case history Acute chest pain – Triple rule out Diagnosis Subsegmental pulmonary embolism. Protocol Tube voltage 1 (kV) 120 Tube current 1 (mAs) 560 DLP 834 CTDI 29,0 mSv k.A. Siemens Scanner SOMATOM Definition This case has been submitted to the Siemens Image Quality Contest 2010. Read more

Case history DECT images of patients with known gout. Images of the right knee reveals uric acid (UA) deposits along the collateral & cruciate ligaments and in the prepatellar region. It is evident that with the material decomposition algorithm, UA can be clearly depicted in red thereby confirming the diagnosis of … Read more

Case history 64 year-old female presents with history of neck and chest pain. Diagnosis Thickened quadricuspid pulmonary valve. Aneurysmal dilatation and asymmetry of pulmonary arteries. Stenosis of mid LAD with a component of myocardial bridging. Description Had “Definition” not been available, patient would have been imaged using routine helical sequence at presumably larger … Read more

Case history: Child with nepphroblastoma before initiation of chemotherapy. Diagnosis: Exclusion of infiltrates Read more

The following question has been sent by Patrick, CT Tech: Our facilty is currently operating a siemens Definition Scanner. I was hoping you could recommend some reading material on Dual Source CT. Also some info on how to reduce radiation exposure. Ralf Bauer, MD, Clinic of the Goethe University, Frankfurt, Germany: Dear … Read more

Cardiac computed tomography (CT) represents a reliable and accurate modality for the diagnosis and exclusion of coronary artery disease. A huge number of studies have investigated the diagnostic performance of CT coronary angiography among different generations of CT scanners. Nevertheless, radiation doses still remain a matter of concern. Read more

The objective was to prospectively investigate the diagnostic accuracy of high-pitch (HP) dual-source computed tomography coronary angiography (CTCA) compared with catheter coronary angiography (CCA) for the diagnosis of significant coronary stenoses. Read more

Objective We evaluated radiation exposure and image quality of a new coronary CT angiography protocol, high-pitch spiral acquisition, using dual source CT (DSCT). Materials and methods Coronary CTA was performed in 25 consecutive patients with a stable heart rate of 60 bpm or less after premedication, using 2 x 128 0.6-mm sections, 38.4-mm … Read more

Case history: 45-year-old female with cholangiocellular carcinoma and known peritoneal carcinosis presents for follow-up scan post surgery and post chemotherapy. Question: Can virtual non-enhanced imaging confirm the presence of a small renal stone in the lower pole of the right kidney found incidentally? Read more

To prospectively investigate computed tomographic (CT) image quality parameters by using different protocols and to calculate radiation dose estimates for noninvasive coronary angiography performed with dual-source CT in the step-and-shoot (SAS) mode. Read more