hepatic inflammatory pseudotumor (ipt) is a rare non-neoplastic process of unknown etiology, generally following a benign inflammatory condition. it is often mistaken as an either primary or metastatic malignancy in imaging studies. we report a 48 year-old female with numerous target lesions (2-4 cm) seen on high resolution ultrasound, spiral ct scan, and mri in all liver lobes compatible with ...

Plain x-rays can reveal opaque renal calculi. They may also be helpful in nephrocalcinosis where there is increased uptake of calcium by the kidneys. CT scan of kidneys, ureter and bladder is the preferred imaging modality looking for renal calculi. CT scanning has a higher radiation dose than plain x-ray but it has a much better sensitivity for detecting a stone both directly and indirectly (e...

Sir, pulmonary emboli, weight-adjusted thrombolytic Acute pulmonary embolism is potentially fatal unless therapy was given. Patient 4 presented with syncope treated early. Thrombolytic therapy is beneficial for and shortness of breath. Electrocardiogram revealed patients with acute pulmonary embolism who are an S 1 O 3 T 3 pattern, and echocardiogram showed hypotensive and have arterial hypoxae...

STUDY OBJECTIVE To evaluate the feasibility of lung cancer screening using low-dose spiral CT as a part of annual health examinations. DESIGN Nonrandomized, screening practice. METHODS From April 1998 to August 2000, CT screening was performed as a part of annual health examinations on a total of 7,956 individuals who belonged to the Hitachi Employee's Health Insurance Group. Of those parti...

For applications in bolus-chasing computed tomography (CT) angiography and electron-beam micro-CT, the backprojection-filtration (BPF) formula developed by Zou and Pan was recently generalized by Ye et al to reconstruct images from cone-beam data collected along a rather flexible scanning locus, including a nonstandard spiral. A major implication of the generalized BPF formula is that it can be...

The efficacy of computed tomography (CT) screening for early lung cancer detection in heavy smokers is currently being tested by a number of randomized trials. Critical issues remain the frequency of unnecessary treatments and impact on mortality, indicating the need for biomarkers of aggressive disease. We explored microRNA (miRNA) expression profiles of lung tumors, normal lung tissues and pl...

Spiral computed tomographic (CT) data sets coupled with a real-time volume-rendering technique allow creation of accurate three-dimensional (3D) images that can be used for a wide range of clinical applications. The image contrast of and relative pixel attenuations in the final image can be interactively modified by the user in real time by manipulating trapezoidal transfer functions. Although ...

No single non invasive test has sufficient diagnostic accuracy to be used alone for diagnosing or ruling out pulmonary embolism. Therefore, modern diagnostic strategies for pulmonary embolism rely on combinations of non invasive tests such as plasma D-dimer measurement, lower limb venous compression ultrasonography, ventilation-perfusion lung scan and/or spiral CT, the results of which should b...

Cone-beam computed tomography (CBCT) is an increasingly utilized imaging modality for the diagnosis and treatment planning of the patients with craniomaxillofacial (CMF) deformities. CBCT scans have relatively low cost and low radiation dose in comparison to conventional spiral CT scans. However, a major limitation of CBCT scans is the widespread image artifacts such as noise, beam hardening an...