Quantitative evaluation of pancreatic enhancement during dual-phase helical CT.

Hollett, M D; Jorgensen, M J; Jeffrey, R. Brooke

doi:10.1148/radiology.195.2.7724753

Cited by 97 publications

(29 citation statements)

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“…To maximize the conspicuity of vessels and pancreatic tumors, the pancreas and adjacent visceral structures are commonly scanned at different phases of contrast enhancement. For example, the early arterial phase is requested for CT angiographic reconstruction or to evaluate peripancreatic arteries, the pancreatic phase is requested for the greatest likelihood of pancreatic tumor detection ( 13,(15)(16)(17)(18), and the portal venous phase is requested to evaluate vascular invasion and distant metastases.…”

Section: Patientsmentioning

confidence: 99%

CT of the Pancreas: Comparison of Anatomic Structure Depiction, Image Quality, and Radiation Exposure between 320-Detector Volumetric Images and 64-Detector Helical Images

Goshima¹,

Kanematsu²,

Nishibori³

et al. 2011

Radiology

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Purpose:To prospectively compare 320-detector volumetric and 64-detector helical computed tomographic (CT) images of the pancreas for depiction of anatomic structures, image noise, and radiation exposure. Materials and Methods:This study was approved by the institutional review board, and written informed consent was obtained. A total of 154 patients (85 men, 69 women; age range, 26-85 years; mean age, 67 years) who underwent biphasic (arterial and pancreatic phase) contrast material-enhanced CT performed with a 320-detector scanner were randomized into two groups: the 320-detector group and the 64-detector group. Biphasic transaxial multiplanar reformatted images and volume-rendered CT angiograms were obtained. CT numbers in the abdominal aorta, pancreas, and abdominal wall fat tissue; signal-to-noise ratio (SNR); and dose-length product (DLP) were compared. In addition, image quality and focal lesion depiction ( n = 35) were qualitatively determined in the two groups. Unpaired t and Mann-Whitney tests were used for quantitative and qualitative assessment, respectively. Results:No signifi cant difference in CT numbers of the abdominal aorta and pancreas was noted between the two groups. Mean DLP was 43% lower in the 320-detector group (675.4 mGy·cm) than in the 64-detector group (1187.8 mGy·cm) ( P , .001 ). SNR of the abdominal aorta, pancreas, and abdominal wall fat on biphasic images was signifi cantly lower in the 320-detector group than in the 64-detector group ( P , .001). Image quality was acceptable in both groups and was slightly better in the 64-detector group for pancreatic phase axial images ( P = .02) and arterial phase multiplanar reformatted images ( P , .01). No signifi cant difference was found in the depiction of pancreatic parenchyma, main pancreatic duct, focal pancreatic lesions, splanchnic arteries, or most of the small splanchnic arterial branches. Conclusion:A 320-detector CT scan facilitates fast volumetric contrastenhanced CT of the entire pancreas with acceptable image quality, even though SNR was signifi cantly lower at 320-detector volumetric scanning.q RSNA, 2011 1

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Section: Patientsmentioning

confidence: 99%

CT of the Pancreas: Comparison of Anatomic Structure Depiction, Image Quality, and Radiation Exposure between 320-Detector Volumetric Images and 64-Detector Helical Images

Goshima¹,

Kanematsu²,

Nishibori³

et al. 2011

Radiology

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“…CT, in particular, is the method of choice in the assessment of normal pancreatic parenchyma and in the detection and staging of pancreatic adenocarcinoma 9,12,20 . The majority of standard CT protocols 9,11,12,[31][32][33][34] , entails an unenhanced acquisition followed by pancreatic parenchymal phase (PPP), portal venous phase (PVP) and delayed phase.…”

Section: Discussionmentioning

confidence: 99%

“…Standard CT protocols involve bi-or triphasic techniques with different results; one of the most relevant limitation of multiphasic CT technique is the patient's exposure to increased radiation doses [11][12][13][14][15][16][17][18][19][20][21][22][23][24] .…”

Section: Multidetector-row Computed Tomography (Mdct) Ismentioning

confidence: 99%

Value of split-bolus multidetector-row CT technique in the quantitative assessment of pancreatic enhancement

Scialpi¹,

Rondoni²,

Recchia³

et al. 2017

MMJ

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“…However, since most islet cell tumors are also confidently identified during the pancreatic parenchymal phase, it is not necessary to have two different CT protocols [28,29]. For this reason, there is general agreement that when a biphasic dynamic CT is performed, the earlier phase should be performed during the pancreatic parenchymal phase [14,15].…”

Section: 2mentioning

confidence: 99%

Pancreas

Mileto

Marin

Nelson

2013

CT of the Retroperitoneum

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Quantitative evaluation of pancreatic enhancement during dual-phase helical CT.

Abstract: Pancreatic enhancement at helical CT with an early delay after contrast material administration is often significantly greater than the enhancement seen with a standard delay when a monophasic, rapidly infused bolus of contrast material is used.

Cited by 97 publications

References 0 publications

CT of the Pancreas: Comparison of Anatomic Structure Depiction, Image Quality, and Radiation Exposure between 320-Detector Volumetric Images and 64-Detector Helical Images

CT of the Pancreas: Comparison of Anatomic Structure Depiction, Image Quality, and Radiation Exposure between 320-Detector Volumetric Images and 64-Detector Helical Images

Value of split-bolus multidetector-row CT technique in the quantitative assessment of pancreatic enhancement

Pancreas

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