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Titolo:
CT angiography: In vitro comparison of five reconstruction methods
Autore:
Addis, KA; Hopper, KD; Iyriboz, TA; Liu, Y; Wise, SW; Kasales, CJ; Blebea, JS; Mauger, DT;
Indirizzi:
Penn State Univ, Dept Radiol, Hershey, PA 17033 USA Penn State Univ Hershey PA USA 17033 , Dept Radiol, Hershey, PA 17033 USA Penn State Univ, Coll Med, Hershey, PA 17033 USA Penn State Univ Hershey PA USA 17033 niv, Coll Med, Hershey, PA 17033 USA Penn State Univ, Dept Hlth Evaluat Sci, Hershey, PA 17033 USA Penn State Univ Hershey PA USA 17033 h Evaluat Sci, Hershey, PA 17033 USA
Titolo Testata:
AMERICAN JOURNAL OF ROENTGENOLOGY
fascicolo: 5, volume: 177, anno: 2001,
pagine: 1171 - 1176
SICI:
0361-803X(200111)177:5<1171:CAIVCO>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
RENAL-ARTERY STENOSIS; MAXIMUM-INTENSITY-PROJECTION; SHADED-SURFACE DISPLAY; CAROTID-ARTERY; SPIRAL CT; HELICAL CT; CONVENTIONAL ANGIOGRAPHY; BIFURCATION; DIAGNOSIS; DISEASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Hopper, KD Penn State Univ, Dept Radiol, POB 850,H066, Hershey, PA 17033 USA Penn State Univ POB 850,H066 Hershey PA USA 17033 PA 17033 USA
Citazione:
K.A. Addis et al., "CT angiography: In vitro comparison of five reconstruction methods", AM J ROENTG, 177(5), 2001, pp. 1171-1176

Abstract

OBJECTIVE. Five image reconstruction techniques have been used with CT angiography: axial (cross-sectional), maximum intensity projection (MIP), curved multiplanar reconstruction (MPR), shaded-surface display, and volume rendering. This study used a phantom to compare the accuracy of these techniques for measuring stenosis. SUBJECTS AND METHODS. A 19-vessel phantom containing various grades of concentric stenoses (0-100%) and three lengths (5, 7.5, and 10 mm) of stenoseswas used for this study. Scans were obtained with a slice thickness of 2.0mm, slice interval of 1.0 mm, pitch of 1.0, 120 kVp, 200 mA, and with the vessels oriented parallel to the z-axis and opacified with nonionic contrast material. CT angiography images were produced using five optimized techniques: axial, MIR MPR, shaded-surface display, and volume rendering; and measurements were made with an electronic cursor in the normal lumen and mid stenosis by five separate investigators who were unaware of vessel and stenosis diameters. Each of the techniques was first optimized according to the radiology literature and our own preliminary testing. RESULTS. For vessels greater than 4 mm in diameter, axial, MIP, WR, shaded-surface display, and volume-rendering CT angiography techniques all had a measurement error of less than 2.5%. However. axial, MIF, MPR, and shaded-surface display techniques were less accurate in estimating smaller (less than or equal to 4 mm) diameters. Volume rendering tended to be more accuratein the measurement of vessels with a 2.0- to 4.0-mm diameter and was statistically more accurate for diameters of 0.5-1.0 mm (p < 0.001). CONCLUSION. All five CT angiography display techniques (axial, MIR MPR, shaded-surface display, and volume rendering) accurately display vessels and stenoses greater than 4 nun in diameter. However, volume rendering tends tobe more accurate for stenoses of 2-4 mm. and was statistically better in the measurement of diameters of 0.5-1.0 mm (p < 0.001). Volume rendering is an accurate method for evaluating all grades of stenoses.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:40:14