Image quality of flat panel cone-beam CT

被引：15

作者：

Rose, G ^{[1
]}

Wiegert, J ^{[1
]}

Schäfer, D ^{[1
]}

Fiedler, K ^{[1
]}

Conrads, N ^{[1
]}

Timmer, J ^{[1
]}

Rasche, V ^{[1
]}

Noordhoek, N ^{[1
]}

Klotz, E ^{[1
]}

Koppe, R ^{[1
]}

机构：

[1] Philips Res Labs, D-52066 Aachen, Germany

来源：

MEDICAL IMAGING 2003: PHYSICS OF MEDICAL IMAGING, PTS 1 AND 2 | 2003年 / 5030卷

关键词：

cone-beam CT; flat panel detector; image quality; spatial resolution; low contrast detectability; C-arm;

D O I：

10.1117/12.479973

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We present results on 3D image quality in terms of spatial resolution (MTF) and low contrast detectability, obtained on a flat dynamic X-ray detector (FD) based cone-beam CT (CB-CT) setup. Experiments have been performed on a high precision bench-top system with rotating object table, fixed,X-ray tube and 176x176 mm(2) active detector area (Trixell Pixium 4800). Several objects, including CT performance-, MTF- and pelvis phantoms, have been scanned under various conditions, including a high dose setup in order to explore the 3D performance limits. Under these optimal conditions, the system is capable of resolving less than 1% (similar to10 HU) contrast in a water back-ground. Within a pelvis phantom, even inserts of muscle and fat equivalent are clearly distinguishable. This also holds for fast acquisitions of up to 40 fps. Focusing on the spatial resolution, we obtain an almost isotropic three-dimensional resolution of up to 30 1p/cm at 10% modulation.

引用

页码：677 / 683

页数：7

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