Dynamic hepatic CT: how many years will it take 'til we learn?

Walkey, M M

doi:10.1148/radiology.181.1.1887029

Cited by 52 publications

(22 citation statements)

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“…Metastatic tumors are usually hypovascular in comparison with the surrounding liver [ 2 6 -2 8 ] . Therefore, to detect hepatic metastases, the scan should be performed at the peak period of hepatic enhancement, which occurs approximately 25 s after termination of contrast material injection for rates of 1 -3 ml/ s, i.e., about 70 s after the start of the injection [26]. In contrast, classical H C C is characterized by an exclusively arterial blood supply (hypervascularity).…”

Section: Discussionmentioning

confidence: 99%

Detection of hypervascular hepatocellular carcinoma by using spiral volumetric CT: Comparison of US and MR imaging

et al. 1995

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Section: Discussionmentioning

confidence: 99%

Detection of hypervascular hepatocellular carcinoma by using spiral volumetric CT: Comparison of US and MR imaging

et al. 1995

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“…But the duration of this phase is di cult to estimate [5]. This is mainly due to the variations of the hepatic enhancement, with a large number of parameters (type and quantity of contrast material, injection ow and duration, monophasic or biphasic injection) or the tumor types [6]. Many clinical studies have been performed during the last 10 years, in order to understand the in uence of all these features.…”

Section: State Of the Artmentioning

confidence: 99%

Hepatic tumor enhancement in computed tomography: combined models of liver perfusion and dynamic imaging

Bézy-Wendling

Krȩtowski

Rolland

2003

Computers in Biology and Medicine

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The objective of this study is to show how computational modeling can be used to increase our understanding of liver enhancement in dynamic computer tomography. It relies on two models: (1) a vascular model, based on physiological rules, is used to generate the 3D hepatic vascular network; (2) the physical process of CT acquisition allows to synthesize timed-stamped series of images, aimed at tracking the propagation of a contrast material through the vessel network and the parenchyma. The coupled models are used to simulate the enhancement of a hyper-vascular tumor at di erent acquisition times, showing a maximum conspicuity during the arterial phase. ?

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“…Significant controversy exists regarding the proper volume of contrast, rates, and delay for hepatic scanning during the optimal "temporal window." Standard scanning [6] generally has employed a 2 s scan time and 6-7 s ISD. This 6-7 s ISD is usually sufficient for patients to breathe between individual scans.…”

Section: Methodsmentioning

confidence: 99%

Cluster scanning in body CT

et al. 1994

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Rapid, dynamic computed tomography (CT) is essential in scanning the body in order to maintain adequate contrast enhancement during the entire examination. In the case of the liver, this is most critical in order to complete scanning prior to the equilibrium phase when lesions are less conspicuous or may be missed entirely. This technical note describes the application of "cluster scanning" to conventional scanning in order to optimize body CT by decreasing the total exam time.

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Dynamic hepatic CT: how many years will it take 'til we learn?

Cited by 52 publications

References 0 publications

Detection of hypervascular hepatocellular carcinoma by using spiral volumetric CT: Comparison of US and MR imaging

Detection of hypervascular hepatocellular carcinoma by using spiral volumetric CT: Comparison of US and MR imaging

Hepatic tumor enhancement in computed tomography: combined models of liver perfusion and dynamic imaging

Cluster scanning in body CT

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