# US 2019/0167110 A1 · Control processing system and imaging method for subcutaneous vein developing device

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- Number: US 2019/0167110 A1
- Document ID: US20190167110A1
- Status: Published application
- Kind: A1
- Application number: 16/304,560
- Filed: 2016-10-08
- Published: 2019-06-06
- Earliest claimed: 2016-05-26
- Assignees: Shenzhen University
- Applicants: Shenzhen University
- Inventors: Guo DAN; Zihao CHEN; Yu YI; Siping CHEN
- Web page: https://patentgrep.com/patent/US20190167110A1

## CPC

- A61B 5/0082: {adapted for particular medical purposes}
- A61B 5/489: {Blood vessels}
- A61B 5/7445: {Display arrangements, e.g. multiple display units}
- G16H 30/40: for processing medical images, e.g. editing
- G16H 40/63: for local operation
- A61B 5/004: {adapted for image acquisition of a particular organ or body part (A61B5/0082 takes precedence; arrangements for optical scanning A61B5/0062)}
- A61B 5/02007: {Evaluating blood vessel condition, e.g. elasticity, compliance}
- A61B 5/1079: {using optical or photographic means}
- A61B 5/743: {Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots}
- A61B 2090/366: {using projection of images directly onto the body}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA

## Abstract

A control processing system and an imaging method for a subcutaneous vein developing device are provided. The control processing system includes a processor subsystem and a programmable logic subsystem. The processor subsystem and the programmable logic subsystem are interconnected via a high-bandwidth Advanced eXtensible Interface (AXI) bus. The control processing system is in signal communication with a visible light source driving circuit, a near infrared light source driving circuit, a projection imaging element driving circuit, a near infrared imaging element driving circuit, a display screen driving circuit, and a user control interface. For a subcutaneous vein developing imaging application and imaging characteristics thereof, a control processing system architecture of a subcutaneous vein developing system is designed and is implemented in a manner of combining software and hardware.

## Claims

### Claim 1

A control processing system, comprising
a processor subsystem, and
a programmable logic subsystem interconnected to the processor subsystem via a high-bandwidth bus,
wherein the high-bandwidth bus is an Advanced eXtensible Interface (AXI) bus including AXI-Lite or AXI-Stream,
and wherein the control processing system is in signal communication with a visible light source driving circuit, a near infrared light source driving circuit, a projection imaging element driving circuit, a near infrared imaging element driving circuit, a display screen driving circuit, and a user control interface.

### Claim 2 (depends on 1)

The control processing system according to claim 1, wherein the visible light source driving circuit, the near infrared light source driving circuit, the projection imaging element driving circuit, the near infrared imaging element driving circuit, the display screen driving circuit, and the user control interface are in signal communication with the control processing system, to implement data collection and projection imaging of a near infrared image of a subcutaneous venous vessel; and the control processing system is responsible for image data processing and system control.

### Claim 3 (depends on 1)

The control processing system according to claim 1, further comprising an image data collection module, an image cutting and scaling module, an image exposure statistics module, an image contrast enhancement module, a video source multiplexing module, a projection output module, a display screen output module, an automatic exposure adjuster and controller module, an image exposure assessment module, a system parameter control module, and a memory module, wherein the modules are in signal communication with each other.

### Claim 4

An image processing method using a control processing system, comprising:
collecting data on a near infrared image of a subcutaneous venous vessel, and performing cutting, scaling, and offset adjustment processing on a collected image;
adjusting a near infrared light source in a subcutaneous vein developing device system according to an exposure condition of the collected image, to provide a stable and appropriate image exposure status for subsequent image enhancement processing, wherein the adjusting a near infrared light source in a subcutaneous vein developing device system comprises image exposure statistics, image exposure assessment, and automatic exposure adjustment and control of the light source;
enhancing the contrast of the image; and
performing further processing on a resultant image to be output, to implement two-way synchronous display output of a projection imaging element and a display screen.

### Claim 5 (depends on 4)

The image processing method according to claim 4, wherein during collecting data on a near infrared image of a subcutaneous venous vessel,
sizes of actual coverage regions of a collection lens and a projection lens are measured respectively according to a projected image, and a position of the coverage region of the projection lens relative to the coverage region of the collection lens is measured, to perform cutting, scaling, and offset adjustment processing on the collected image.

### Claim 6 (depends on 4)

The image processing method according to claim 4, wherein in the image exposure statistics different weight values are set according to degrees of attention given by a user to different regions and then performing weighted averaging on exposure information of each region, and next, comparison and assessment are performed on obtained image exposure information and automatic exposure adjustment and control of the near infrared light source is implemented.

### Claim 7 (depends on 4)

The image processing method according to claim 4, wherein the enhancing comprises a transform domain-based method, a histogram equalization method, or various improvement methods derived therefrom.

### Claim 8 (depends on 7)

The image processing method according to claim 7, wherein the improvement methods comprise global histogram equalization, or brightness preserving bi-histogram equalization, or Sigmoid function-based bi-histogram equalization, or contrast limited adaptive histogram equalization (CLAHE).

### Claim 9 (depends on 4)

The image processing method according to claim 4, further comprising processing an output video by using a time-division multiplexing method, to implement two-way synchronous display output of the projection imaging element and the display screen.