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Development and evaluation of a new gray-scale test pattern to adjust gradients of thoracic CT imaging.

Abstract：

:The purpose of the present study was to evaluate the usefulness of a new gray-scale test pattern (NGTP) that was developed to easily adjust the gradients of thoracic CT imaging and enable visual consistency. The Society of Motion Picture and Television Engineers (SMPTE) pattern and the NGTP were used for comparison. The luminance character of two test patterns was evaluated by a luminance meter with three different window widths and levels (for default, mediastinum and lung). We also investigated whether SMPTE or NGTP is more suitable for adjusting the gradient of thoracic CT imaging. We found that it was easier to adjust the gradient of thoracic CT imaging with NGTP than with SMPTE, because the digital range of NGTP is 12 bits (the value of 4,096 HU, from -1,024 to 3,071 HU), and adjustable in any window width. We were able to adjust the gradients of hard-copy and soft-copy thoracic CT imaging within several hours using NGTP. We propose that NGTP is the most suitable tool for adjusting the gradients of thoracic CT imaging. NGTP can cope with any medical diagnostic display system connected with CT or MRI equipment in a network because it is in DICOM format.

journal_name

Eur Radiol

journal_title

European radiology

authors

Yamaguchi M,Fujita H,Uemura M,Asai Y,Wakae H,Ishifuro M

doi

10.1007/s00330-004-2315-3

subject

Has Abstract

pub_date

2004-12-01 00:00:00

pages

2357-61

issue

12

eissn

0938-7994

issn

1432-1084

journal_volume

14

pub_type

杂志文章

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