Computed tomographic scanning versus radioisotope imaging in adrenocortical diagnosis - CK, HW, et al. () Citation Context ...mass. Small aldosteronomas are not always readily visualized by CT. When larger than 0.8 cm, localizing accuracies range between 60% and 80%, depending upon the type...
CT scanning of the lungscan help detect changes in the lung architecture due to fibrosis (scarring),emphysema, tumors,atelectasis(collapsed lung), andpleural effusion. CT scanning of the skeletal systemcan aid in diagnosing a spinal cord injury,pathologic fractures, bone tumors, or lesions and he...
Computed tomographic scanning is faster and less expensive, and involves lower radiation doses to the patient than scintigraphy. Adrenocortical isotope scanning as a routine procedure has been superseded by computed tomographic scanning at the Mayo Clinic. 展开 ...
This medical procedure combines aspects of computed tomography scanning and plain-film myelography. A CT scan is an imaging technique in which cross-sectional x rays of the body are compiled to create a three-dimensional image of the body's internal structures. Myelography involves injecting a wate...
Tomographic data acquisition involves two primary stages: data collection during the scanning of the object and the subsequent reconstruction of this data into a three-dimensional model. The object undergoes a 360-degree step-by-step rotation around the axis of rotation during the scanning process, ...
CT scanning of the modern fruit specimen; top view (a) and side view (b), transverse sections in the endocarp (c,d) Ov ovules; longitudinal section (Se seed) (e), and the shape and form of the whole cone (f). Full size image Microchemical analysis of the archaeobotanical material ...
Excised urinary calculi were subjected to computed tomographic (CT) scanning in an attempt to determine whether CT attenuation values would allow accurate analysis of stone composition. The mean, maximum, and modal pixel densities of the calculi were recorded and compared; the resulting values reflect...
Using multiplanar imaging and computer software, virtual hyperemia and computation modeling could be performed to estimate the functional significance of the lesions using CTFFR approach17. Calculation of CTFFR involves three main elements: physiological modeling of blood flow along with anatomical ...
The CT projections are then converted into tomographic 3D image slices taken through the subject in a process termed reconstruction. This mathematical process takes 2D image elements (pixels) from the projections and then “back-projects” them to form reconstructed 3D image elements (voxels) in ...
CT is less expensive than MRI and has a shorter scanning time, which may benefit some patients, although CT involves exposure to ionizing radiation. Because of its ability to assess both cortical and trabecular bone, CT can be used to assess for osteopenia or osteoporosis. This assessment can ...