NDLI: Initial investigation of circle-plus-arc orbit variants with a dedicated emission mammotomograph

Content Provider	IEEE Xplore Digital Library
Author	Archer, C.N. Tornai, M.P. Bowsher, J.E. Bradshaw, M.L.
Copyright Year	2003
Description	Author affiliation: Departments of Biomed. Eng., Duke Univ. Med. Sch., Durham, NC, USA (Archer, C.N.; Tornai, M.P.)
Abstract	A dedicated emission mammotomograph, uniquely capable of imaging in a hemisphere, is utilized to image the breast by way of complex acquisition orbits, completely sampling most of the breast. Orbits such as the circle-plus-arc (CPA) in particular provide for extended viewing times in a specific portion of the breast. This is advantageous in that as a diagnostic rather than screening imaging tool, a long duration of the camera trajectory may be distinctly positioned in the quadrant where the lesion is suspected. However, orbit modifications that distribute the scan time more evenly over the breast may also be effective. As the trajectories conform to the shape of the breast, including dynamic radius-of-rotation control, resolution degradation is minimized. However, for both the arc and the circular portion of the orbit. increased background contamination may result since the line-of-sight of the single photon camera can view unscattered primary radiation, particularly from cardiac and hepatic sources. The effect of azimuthal position of the arc, as well as the degree of the arc, on image quality is investigated by measurements of lesion signal-to-noise ratios and contrasts. Additionally, because the resolution characteristics of the CPA are not uniform throughout breast quadrants, the implementation of a modified orbit, in the shape of a 3D cloverleaf is investigated through measurements of the breast phantom alone with lesions of varying radioactive concentrations, and with additional torso backgrounds. These initial results indicate that polar tilt does affect image quality, with low polar tilt showing little variation in SNRs and contrasts, while increasing tilt decreases SNRs and contrasts by /spl sim/2/spl times/ when torso background is present. Considering the effect of azimuthal arc location, /spl theta/=45/spl deg/ yields the highest SNRs and contrasts for the locations at which SNR was evaluated. Both cloverleaf orbits yield comparable SNRs and contrasts to the CPA orbits.
Starting Page	1118
Ending Page	1122
File Size	768542
Page Count	5
File Format	PDF
ISBN	0780376366
DOI	10.1109/NSSMIC.2002.1239518
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Breast Lesions Cameras Shape control Image quality Extraterrestrial measurements Pollution measurement Shape measurement Torso Image sampling
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Towards patient imaging with dedicated emission mammotomography

3D data acquisition sampling strategies for dedicated emission mammotomography for various breast sizes

Implementation and initial characterization of acquisition orbits with a dedicated emission mammotomograph

Investigation of full-field CZT detector for emission mammotomography

Novel patient optimized acquisition trajectories for dedicated breast SPECT imaging

Empirical effects of angular sampling and background content on image quality in dedicated breast SPECT

A novel application specific emission tomograph (ASET) for breast imaging

Comparison of compact gamma cameras with 1.3 mm and 2.0 mm quantized elements for dedicated emission mammotomography

Dynamic laser-guided contouring for dedicated emission mammotomography

Initial investigation of circle-plus-arc orbit variants with a dedicated emission mammotomograph

Similar Documents

Towards patient imaging with dedicated emission mammotomography

3D data acquisition sampling strategies for dedicated emission mammotomography for various breast sizes

Implementation and initial characterization of acquisition orbits with a dedicated emission mammotomograph

Investigation of full-field CZT detector for emission mammotomography

Novel patient optimized acquisition trajectories for dedicated breast SPECT imaging

Empirical effects of angular sampling and background content on image quality in dedicated breast SPECT

A novel application specific emission tomograph (ASET) for breast imaging

Comparison of compact gamma cameras with 1.3 mm and 2.0 mm quantized elements for dedicated emission mammotomography

Dynamic laser-guided contouring for dedicated emission mammotomography

Initial investigation of circle-plus-arc orbit variants with a dedicated emission mammotomograph