Contrast-enhanced MR angiography of the mesenteric circulation: a pictorial essay.

Shirkhoda, Ali; Konez, Orhan; Shetty, Anil N.; Bis, Kostaki G.; Ellwood, Robert A.; Kirsch, M.

doi:10.1148/radiographics.18.4.9672970

Cited by 31 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Single-detector row helical CT demonstrates the collateral vessels very accurately. Magnetic resonance (MR) imaging is probably as accurate as CT but is more expensive and less accessible; in addition, some of the rarest pathways (eg, pleuropericardial or thoracic wall varices) may be missed at MR imaging (6). An important advantage of multi-detector row CT over single-detector row helical CT is the increased speed of scanning, which permits routine use of very thin collimation for imaging the portosystemic collateral vessels (2).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Multi–Detector Row CT Portal Venography in the Evaluation of Portosystemic Collateral Vessels in Liver Cirrhosis

Kang

Jeong

Choi³

et al. 2002

RadioGraphics

121

View full text Add to dashboard Cite

Multi-detector row computed tomography (CT) offers distinct advantages over traditional spiral CT. Multi-detector row CT scanners are faster and allow thinner collimation than single-detector row spiral CT scanners. The use of multi-detector row CT combined with postprocessing of the imaging data with a variety of three-dimensional reformatting techniques (eg, maximum intensity projection, shaded surface display, volume rendering) allows creation of vascular maps whose quality equals or exceeds that of maps created at classic angiography for many applications. Three-dimensional multi-detector row CT portal venography can help determine the extent and location of portosystemic collateral vessels (eg, left gastric vein, short gastric vein, esophageal and paraesophageal varices, splenorenal and gastrorenal shunts, paraumbilical and abdominal wall veins) in patients with liver cirrhosis and is probably the optimal imaging technique in this setting. © RSNA, 2002Abbreviations: MIP ϭ maximum intensity projection, SSD ϭ shaded surface display, 3D ϭ three-dimensional

show abstract

Section: Introductionmentioning

confidence: 99%

Three-dimensional Multi–Detector Row CT Portal Venography in the Evaluation of Portosystemic Collateral Vessels in Liver Cirrhosis

Kang

Jeong

Choi³

et al. 2002

RadioGraphics

121

View full text Add to dashboard Cite

show abstract

“…This phenomenon has been known since the early studies on abdominal MRA [9] and affected as many as 16% of patients undergoing conventional MRA in a recent study [7]. Blurring artefacts in proximal visceral arteries are caused by small movements of the diaphragm during breathholding [26], by motion triggered through cardiac contraction and pulsatile oscillations of the aorta and its branches [27,28], as well as by motion as a result of intestinal peristalsis [29]. Motion-induced artefacts during breathholding are also reported for renal arteries [30], and fast MRA has been shown in a recent study to improve image quality of the distal segments of the renal arteries in particular [17].…”

Section: Discussionmentioning

confidence: 99%

MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography

et al. 2009

View full text Add to dashboard Cite

MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography Abstract The purpose of the study was to retrospectively compare threedimensional gadolinium-enhanced magnetic resonance angiography (conventional MRA) with MRA accelerated by a parallel acquisition technique (fast MRA) for the assessment of visceral arteries, using 64-detector-row computed tomography angiography (MDCTA) as the reference standard. Eighteen patients underwent fast MRA (imaging time 17 s), conventional MRA (29 s) and MDCTA of the abdomen and pelvis. Two independent readers assessed subjective image quality and the presence of arterial stenosis. Data were analysed on per-patient and persegment bases. Fast MRA yielded better subjective image quality in all segments compared with conventional MRA (P=0.012 for reader 1, P=0.055 for reader 2) because of fewer motioninduced artefacts. Sensitivity and specificity of fast MRA for the detection of arterial stenosis were 100% for both readers. Sensitivity of conventional MRA was 89% for both readers, and specificity was 100% (reader 1) and 99% (reader 2). Differences in sensitivity between the two types of MRA were not significant for either reader. Interobserver agreement for the detection of arterial stenosis was excellent for fast (κ=1.00) and good for conventional MRA (κ=0.76). Thus, subjective image quality of visceral arteries remains good on fast MRA compared with conventional MRA, and the two techniques do not differ substantially in the grading of arterial stenosis, despite the markedly reduced acquisition time of fast MRA.

show abstract

“…Grieshop et al [12] reported an 80% incidence of elevated white cell count in cases of MVT. Once the diagnosis is suspected, it may be confirmed using contrast computed tomography (CT) [6] or magnetic resonance angiography (MRA) [13]. Recently, Ha et al [14] reported that CT and MRA gave the most sensitive results in non-pregnant patients with suspected MVT.…”

Section: Discussionmentioning

confidence: 99%

Primary Mesenteric Venous Thrombosis in a 28-Week Pregnant Woman

Fouad¹,

Pathania

Marouf

2001

Med Princ Pract

View full text Add to dashboard Cite

Objectives and Importance: Mesenteric venous thrombosis is a very rare disorder during pregnancy. We report a 28-week pregnant woman who presented with acute abdominal pain that was proved to be due to mesenteric venous thrombosis. Clinical Presentation: A healthy, pregnant woman presented to surgical casualty with an 8-hour complaint of severe generalized abdominal pain. Clinical examination revealed a 28-week gravid uterus and a mildly distended and soft abdomen with absent bowel sounds. Sonographic findings were unremarkable. Intervention: Exploratory laparotomy revealed a gangrenous loop of the sigmoid colon, which was resected, and Hartmann’s procedure was performed. Histopathological examination of the resected bowel tissue confirmed the diagnosis of mesenteric venous thrombosis. The patient was thoroughly screened for the presence of an underlying hypercoagulable state such as a deficiency of protein C, protein S, antithrombin III, activated protein C resistance, lupus anticoagulant, factor V Leiden, and prothrombin gene mutation. No abnormalities were found. Conclusion: Exploratory laparotomy and histological examination of excised bowel tissue were used to confirm a diagnosis of mesenteric venous thrombosis in a 28-week pregnant woman. The clinicians and surgeons should be alerted to such a disease especially in the absence of a pre-existing hypercoagulable state. Exploratory laparotomy, which was diagnostic in this case, should not be delayed.

show abstract

Contrast-enhanced MR angiography of the mesenteric circulation: a pictorial essay.

Cited by 31 publications

References 10 publications

Three-dimensional Multi–Detector Row CT Portal Venography in the Evaluation of Portosystemic Collateral Vessels in Liver Cirrhosis

Three-dimensional Multi–Detector Row CT Portal Venography in the Evaluation of Portosystemic Collateral Vessels in Liver Cirrhosis

MR angiography with parallel acquisition for assessment of the visceral arteries: comparison with conventional MR angiography and 64-detector-row computed tomography

Primary Mesenteric Venous Thrombosis in a 28-Week Pregnant Woman

Contact Info

Product

Resources

About