1. CTHERM for Medical IR Imaging CTHERM for Medical IR Imaging University of Glamorgan School of Computing University of Glamorgan School of Computing P. Plassmann E.F.J. Ring

2. WHY CTHERM ?  Old IR cameras still technically OK but…….  no software support by manufacturers  software under-utilises hardware  Different software required for each camera  Most packages not tailored for medical applications

3. OUR SOLUTION  Create a package that  fully utilises existing camera  can work with as many modern cameras as possible  has specialised medical routines built in  can work with existing images

4. CTHERM CORE MULTI MODAL STRUCTURE AGEMA 780 series camera system dedicated frame grabber module File input / output filters via disk to other IR programs Recent IR cameras PCI frame grabber (PAL or NTSC) PC card (in preparation) Windows clipboard functionality word processor, spreadsheet, network

5. IR IMAGING EQUIPMENT (1986)  PDP 11  GEMS image processing system  AGEMA camera

6. IMAGE QUALITY (1996) Image courtesy of Dr. R. Harding, St. Woolos Hospital, Newport Deep Vein Thrombosis (DVT) u 140x140 pixel image resolution (CATS software) u 12 colours u Display resolution 320x200 (CGA) AGEMA 780 camera

7. IMAGE QUALITY (1999) u 256x256 pixel image resolution u 128 colours u Display resolution 1024x768 or more The same AGEMA 780 camera !

8. AGEMA 780 FRAME GRABBER 4 4 PC in / AGEMA out signal offset and level adjustment A/D converter h-sync offset/level adjustment and decoder clock generator switch: PC - AGEMA control address generator 1 MBit static RAM 9 (512 lines) 8 8 (256 columns) 8 data to PC PC generated signals for new frame, field, line, pixel v-sync new field new line new frame new pixel temp-range temp-offset signal offset and level adjustment analog switch input selector

9. MULTI MODAL STRUCTURE AGEMA 780 series camera system dedicated frame grabber module Windows clipboard functionality File input / output filters word processor, spreadsheet, network via disk to other IR programs Recent IR cameras PCI frame grabber (PAL or NTSC) PC card (in preparation) BTHERM CORE

10. INDUSTRY STANDARD FRAME GRABBER u PAL or NTSC input (s-video or composite video) u 512 x 682 pixel resolution, 8 bits per pixel

11. THE PROBLEMS OF VERSATILITY u D/A --> A/D conversion introduces noise u No information about camera setting in PAL or NTSC image (range, offset, emissivity) u High resolution cameras under-utilised (NTSC resolution: 640x480, PAL 732x549) u Dynamic resolution limited to 8 bits per pixel

12. MULTI MODAL STRUCTURE AGEMA 780 series camera system dedicated frame grabber module Windows clipboard functionality File input / output filters word processor, spreadsheet, network via disk to other IR programs Recent IR cameras PCI frame grabber (PAL or NTSC) PC card (in preparation) BTHERM CORE

13. CTHERM MAIN SCREEN Reservoir Area Toolbar Area 10x10 pixel spot measurement at cursor position Individual colour scale Image data 4 statistics fields for cold stress test analysis Right-click copies to clipboard

14. CTHERM TOOLS: FILE I/O

15. CTHERM TOOLS: STATISTICS u 4 statistics fields u histogram with: mean, min, max stand. deviation u background suppression u save / load shapes u thermolog. indices

16. CTHERM TOOLS: TEXT EDITOR u 4 text fields u Positioning

17. CTHERM TOOLS: ISOTHERM EDITOR u 2 Isotherm levels

18. CROSS-SECTION EDITOR u 4 Cross-sections between any two points

19. COLD STRESS TEST REPORT u Printout on colour printer u Transfer to report form

20. MULTI MODAL STRUCTURE AGEMA 780 series camera system dedicated frame grabber module Windows clipboard functionality File input / output filters word processor, spreadsheet, network via disk to other IR programs Recent IR cameras PCI frame grabber (PAL or NTSC) PC card (in preparation) BTHERM CORE

21. FILE I/O u Windows clipboard functionality  word processors  spreadsheets  presentation packages u Printer output (WYSIWYG) u Image import / output filters

22. SUMMARY The CTHERM package  modular  most recent cameras can be used  specialised modules (CST)  adaptable In the future:  transient processes (DAT)  more I/O filters & hardware support