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System for adjusting brightness of image in magnetic resonance imaging system and method

A technology of brightness adjustment and magnetic resonance, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, magnetic variable measurement, etc., which can solve the problems of low image signal, image signal overflow, loss of details, etc.

Active Publication Date: 2014-07-02
SHENZHEN UNITED IMAGING HEALTHCARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the brightness factor is set too high, it will cause image signal overflow, and if the brightness factor is set too low, the image signal will be too low, the gray level of the image will be lost, and the details will be lost

Method used

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  • System for adjusting brightness of image in magnetic resonance imaging system and method
  • System for adjusting brightness of image in magnetic resonance imaging system and method
  • System for adjusting brightness of image in magnetic resonance imaging system and method

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Embodiment Construction

[0030] Please refer to figure 1 as shown, figure 1 The main components of a magnetic resonance system 10 incorporating the present invention are shown, the system being controlled via an operator console 12 including a keyboard and / or other input device 13 , a control panel 14 and a display screen 16 . Console 12 is connected via connection 18 to a separate computer system 20 which enables an operator to control the generation and display of images on display screen 16 . The computer system 20 includes a number of modules communicating with each other through the backplane 20a, these modules include an image processor module 22, a CPU module 24 and a memory module 26, the memory module 26 can be a well-known in the industry for A framebuffer that stores groups of image data. The computer system 20 is connected to a hard disk 28 and a magnetic disk 30 for storing image data and programs, and is connected to an independent control system 32 through a high speed serial connecti...

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Abstract

The invention discloses a system for adjusting the brightness of an image in a magnetic resonance imaging system. The system comprises a reconstruction module, a searching module, a setting module, a calculation module and a conversion module, wherein the reconstruction module is used for combining signals of receiving coils and carrying out reconstruction to obtain an original image; the searching module is used for searching for the brightness range [Smin, Smax] of the original image; the setting module is used for setting a brightness limit F, F is smaller than 2N, F is a positive integer and N is the image digit; the calculation module is used for calculating a brightness factor alpha, alpha=F / (Smax-Smin); and the conversion module is used for using a formula Id=alpha*Ir to convert the original image into a DICOM (Digital Imaging Communications in Medicine) image, Id is the brightness of the DICOM image, and Ir is the brightness of the original image. The signal brightness part of the image can be ensured to overflow through automatically calculating the brightness factor, and the maximal gray scale range of the magnetic resonance DICOM image can be used maximally.

Description

【Technical field】 [0001] The invention relates to an image brightness adjustment system and method in a magnetic resonance system. 【technical background】 [0002] Modern magnetic resonance imaging equipment usually uses multi-channel receiving coils for imaging. The signals received by multiple channels are combined and then converted into magnetic resonance images in the format of Digital Imaging Communications in Medicine (DICOM for short) for storage and transmission. For magnetic resonance DICOM images, they are usually stored as 12-bit integers, that is, the image has 4096 gray levels. The image after merging multi-channel data is called the original image, the format of the data is floating point type (single precision or double precision), and the brightness range of the signal varies greatly, it is necessary to set a proportional coefficient α (brightness factor) to be Raw images are converted into 12-bit integer DICOM data. If the brightness factor is set too hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/56
Inventor 张强杨伟伟
Owner SHENZHEN UNITED IMAGING HEALTHCARE CO LTD
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