Volume 10, Issue 4 · TMI Watch

Dec. 1991 · Volume 10, Issue 4 · Vol. 10 · Issue 4 · DOI 10.1109/42.108583

Physical characteristics of the ECAT 953B/31: a new high resolution brain positron tomograph

中文标题翻译待生成

B. Mazoyer, R. Trebossen, R. Deutch, M. Casey, K. Blohm

Body Part 身体部位

Modality 模态

Abstract / 摘要

English

A high spatial resolution brain positron tomograph, the ECAT 953B/31, is presented. The machine consists of two 76.5 cm diameter rings (patient port diameter: 36 cm) made of 24 8*8 BGO detector blocks each, each block being coupled to four 1 in/sup 2/ Hammamatsu phototubes. The machine has 15 9 cm*1 mm motorized removable septa, which allows reconstruction of 31 slices 3.375 mm apart. The transaxi...

中文

中文摘要翻译待生成

Author Info / 作者信息

B. Mazoyer Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

R. Trebossen Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

R. Deutch Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

M. Casey Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

K. Blohm Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

Translation: pending AI: pending Article 108583

Dec. 1991 · Volume 10, Issue 4 · Vol. 10 · Issue 4 · DOI 10.1109/42.108593

Entropic contrast enhancement

中文标题翻译待生成

A. Khellaf, A. Beghdadi, H. Dupoisot

Body Part 身体部位

Modality 模态

Abstract / 摘要

English

A technique for the contrast enhancement of a picture is proposed. The method is derived from the entropy concept of information theory. The originality of the algorithm rests on the use of a local contrast to define the digital entropy. The basic idea of the treatment is to enhance the contrast by transforming the global entropy. The same technique can also be used for an adaptive smoothing proce...

中文

中文摘要翻译待生成

Author Info / 作者信息

A. Khellaf Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

A. Beghdadi Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

H. Dupoisot Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

Translation: pending AI: pending Article 108593

Dec. 1991 · Volume 10, Issue 4 · Vol. 10 · Issue 4 · DOI 10.1109/42.108597

Computer-assisted phalangeal analysis in skeletal age assessment

中文标题翻译待生成

E. Pietka, M.F. McNitt-Gray, M.L. Kuo, H.K. Huang

Body Part 身体部位

Modality 模态

Abstract / 摘要

English

A computerized approach to the problem of the assessment of skeletal maturity in pediatric radiology is presented. A CR (computed radiography) hand image to be analyzed is first standardized to obtain a left hand, upright, PA view. Then the phalangeal region of interest is defined and thresholded. After the separation of the third finger, the lengths of the distal, middle, and proximal phalanx are measured automatically. Using the standard phalangeal length table, the skeletal age is estimated. The assessed age has been compared to the estimates obtained by a radiologist using the atlas matching method as well as the chronological age. >

中文

中文摘要翻译待生成

Author Info / 作者信息

E. Pietka Department of Radiological Sciences, University of California, Los Angeles, CA, USA 机构中文翻译待生成或 IEEE 未提供机构

M.F. McNitt-Gray Department of Radiological Sciences, University of California, Los Angeles, CA, USA 机构中文翻译待生成或 IEEE 未提供机构

M.L. Kuo Department of Radiological Sciences, University of California, Los Angeles, CA, USA 机构中文翻译待生成或 IEEE 未提供机构

H.K. Huang Department of Radiological Sciences, University of California, Los Angeles, CA, USA 机构中文翻译待生成或 IEEE 未提供机构

Translation: pending AI: pending Article 108597

Dec. 1991 · Volume 10, Issue 4 · Vol. 10 · Issue 4 · DOI 10.1109/42.108599

A homogeneity correction method for magnetic resonance imaging with time-varying gradients

中文标题翻译待生成

D.C. Noll, C.H. Meyer, J.M. Pauly, D.G. Nishimura, A. Macovski

Body Part 身体部位

Modality 模态

Abstract / 摘要

English

When time-varying gradients are used for imaging, the off-resonance behavior does not just cause geometric distortion as is the case with spin-warp imaging, but changes the shape of the impulse response and causes blurring. This effect is well known for projection reconstruction and spiral k-space scanning sequences. The authors introduce a reconstruction and homogeneity correction method to corre...

中文

中文摘要翻译待生成

Author Info / 作者信息

D.C. Noll Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

C.H. Meyer Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

J.M. Pauly Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

D.G. Nishimura Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

A. Macovski Affiliation not provided by IEEE Xplore 机构中文翻译待生成或 IEEE 未提供机构

Translation: pending AI: pending Article 108599