Multisection CT: Scanning Techniques and Clinical Applications

Abstract

Multisection computed tomography (CT) was introduced in 1992 with the advent of dual-section-capable scanners and was improved in 1998 following the development of quad-section technology. With a recent increase in gantry speed from one to two revolutions per second, multisection CT scanners are now up to eight times faster than conventional single-section helical CT scanners. The benefits of quad-section CT relative to single-section helical CT are considerable. They include improved temporal resolution, improved spatial resolution in the z axis, increased concentration of intravascular contrast material, decreased image noise, efficient x-ray tube use, and longer anatomic coverage. These factors substantially increase the diagnostic accuracy of the examination. The multisection CT technique has enabled faster and superior evaluation of patients across a wide spectrum of clinical indications. These include isotropic viewing, musculoskeletal applications, use of multiplanar reformation in special situations, CT myelography, long coverage and multiphase studies, CT angiography, cardiac scoring, evaluation of brain perfusion, imaging of large patients, evaluation of acute chest pain or dyspnea, virtual endoscopy, and thin-section scanning with retrospective image fusing. Multisection CT is superior to single-section helical CT for nearly all clinical applications.

Murine orthostatic response during prolonged vertical studies: Effect on cerebral blood flow measured by arterial spin‐labeled MRI

“…Positron emission tomography (PET) yields good information on blood flow, but it is expensive and not widely available (11). Recent developments in computed tomography (CT) have led to improvements in temporal and spatial resolution in CBF measurements, but it also requires the use of an exogenous contrast agent (12). Autoradiography is available for use in rodents and has been used in some studies of mice.…”

Pulmonary Intersegmental Planes: Imaging Appearance and Possible Reasons Leading to Their Visualization

“…Thoracic surgeons did not show great interest in their direct imaging appearance, because only a small proportion of intersegmental planes could be identified on thoracic CT scans, and their imaging appearance was not constant (6). Multidetector CT is an accurate modality for the evaluation of lung disease (7)(8)(9). With the enhancement of image quality and resolution, the latest thoracic CT scanners could provide us with images containing much more detailed structures within thinner sections, and pulmonary septa are easier to detect.…”

“…These samples were all prepared according to methods of previous studies (11). Posterior segment S 3 Anterior segment S 4 Lateral segment S 5 Medial segment S 6 Superior segment S 7 Medial basal segment S 8 Anterior basal segment S 9 Lateral basal segment S 10 Posterior basal segment Right lung S 1+2 Apicoposterior segment S 3 Anterior segment S 4 Superior lingular segment S 5 Inferior lingular segment S 6 Superior segment S 7+8 Anteromedial segment S 9 Lateral basal segment S 10 Posterior basal segment THORACIC IMAGING: Pulmonary Intersegmental Planes at CT and MR Zuo et al the intersegmental planes were seen on each section from the inferior pulmonary vein to the base of the left lung (Fig 2c-2f). For the third type, the intersegmental plane was occasionally seen at the center within the lobes between S 7 and S 10 of the right lung (Fig 3).…”

“…For the second type, the intersegmental planes could be appreciated at the base of the lungs. The intersegmental plane was seen between S 7 and S 8 of the right lung (Fig 2a), or it was seen between S 7 and S 10 of the left lung (Fig 2b). In some cases, rates of visible intersegmental planes on multidetector CT scans between the younger group and older group were compared by using the Fisher exact test.…”

Myocardial CT perfusion imaging for ischemia detection

“…Computed tomography (CT) has evolved significantly during the last two decades mainly with the introduction of multidetector CT (MDCT) in 1998 (1)(2)(3). Since the first 4-row MDCT scanners until now this technology has upgraded significantly in contrast, spatial, and temporal resolutions.…”