The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia

Introduction: The mammography has its own unique quality assurance program in order to produce a constantly high quality images. It emphasizes on quality control (QC) such as direct equipment assessment (mammogram machines) and quality audits i.e. film reject analysis and PGMI which acts as an indi...

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Main Author:	Syed Abas, Sharipah Intan Shafina
Format:	Thesis
Language:	English
Published:	2015
Subjects:	R5-130.5 General works
Online Access:	http://eprints.usm.my/39901/1/Dr_Sharipah_Intan_Shafina_Syed_Abas-24_pages.pdf
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spelling	my-usm-ep.399012019-04-12T05:25:56Z The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia 2015 Syed Abas, Sharipah Intan Shafina R5-130.5 General works Introduction: The mammography has its own unique quality assurance program in order to produce a constantly high quality images. It emphasizes on quality control (QC) such as direct equipment assessment (mammogram machines) and quality audits i.e. film reject analysis and PGMI which acts as an indirect assessment tool for personnel involved; mainly radiographers PGMI is a part of standard quality audit for mammogram and widely practiced in many countries. Objectives: In HUSM, the audit of mammogram using PGMI was never performed for rating image quality. PGMI rating comprised of criteria determining mammograms as perfect, good, moderate and inadequate. The College of Radiology Malaysia guidelines recommends >97% of images to be in perfect, good or moderate categories with overall 75% in the perfect & good groups; >3% in the perfect group; and <3% of images to be classified inadequate. Methodology: Digital mammograms from 107 consecutively screened and diagnostic mammograms were sourced in two centers; namely HUSM and HRPZII. Test sets were enriched with mammograms from each PGMI category and independently scored by six radiographers, each with ≥3 years' experience, using PGMI. Each image was individually scored P, G, M, or I. Reasons for scoring less than perfect were documented and each mammogram assigned an overall PGMI score. Test sets were compared with an expert observer. Results: PGMI standard: The overall rating in HUSM for perfect, good and moderate (PGM) rating were calculated as 98%. This was acceptable to the standard set by Malaysian College of Radiology (>97%). While in the perfect & good groups (PG); it was lower than standard which was 52% (QA standard is 75%). As for perfect, its proportion was 15% (QA standard is >3%) and for inadequate was 2% (QAP standard is < 3%). PGMI inter-observer reliability among radiographers’ shows overall poor agreement with κ = 0.18. Most images with poor agreement were related to good and moderate image rating whereas PGMI inter-observer reliability radiographers’ vs. Radiologist shows overall poor agreement with κ = 0.20 and most images with poor agreement were related to good, moderate and inadequate images. Conclusion: Reliability of PGMI must be improved as current study showed its variability and subjective interpretation. Efforts must be made for improvements or modifications of PGMI in order to reduce its subjectivity and maintains its efficiency. 2015 Thesis http://eprints.usm.my/39901/ http://eprints.usm.my/39901/1/Dr_Sharipah_Intan_Shafina_Syed_Abas-24_pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Perubatan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	R5-130.5 General works
spellingShingle	R5-130.5 General works Syed Abas, Sharipah Intan Shafina The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
description	Introduction: The mammography has its own unique quality assurance program in order to produce a constantly high quality images. It emphasizes on quality control (QC) such as direct equipment assessment (mammogram machines) and quality audits i.e. film reject analysis and PGMI which acts as an indirect assessment tool for personnel involved; mainly radiographers PGMI is a part of standard quality audit for mammogram and widely practiced in many countries. Objectives: In HUSM, the audit of mammogram using PGMI was never performed for rating image quality. PGMI rating comprised of criteria determining mammograms as perfect, good, moderate and inadequate. The College of Radiology Malaysia guidelines recommends >97% of images to be in perfect, good or moderate categories with overall 75% in the perfect & good groups; >3% in the perfect group; and <3% of images to be classified inadequate. Methodology: Digital mammograms from 107 consecutively screened and diagnostic mammograms were sourced in two centers; namely HUSM and HRPZII. Test sets were enriched with mammograms from each PGMI category and independently scored by six radiographers, each with ≥3 years' experience, using PGMI. Each image was individually scored P, G, M, or I. Reasons for scoring less than perfect were documented and each mammogram assigned an overall PGMI score. Test sets were compared with an expert observer. Results: PGMI standard: The overall rating in HUSM for perfect, good and moderate (PGM) rating were calculated as 98%. This was acceptable to the standard set by Malaysian College of Radiology (>97%). While in the perfect & good groups (PG); it was lower than standard which was 52% (QA standard is 75%). As for perfect, its proportion was 15% (QA standard is >3%) and for inadequate was 2% (QAP standard is < 3%). PGMI inter-observer reliability among radiographers’ shows overall poor agreement with κ = 0.18. Most images with poor agreement were related to good and moderate image rating whereas PGMI inter-observer reliability radiographers’ vs. Radiologist shows overall poor agreement with κ = 0.20 and most images with poor agreement were related to good, moderate and inadequate images. Conclusion: Reliability of PGMI must be improved as current study showed its variability and subjective interpretation. Efforts must be made for improvements or modifications of PGMI in order to reduce its subjectivity and maintains its efficiency.
format	Thesis
qualification_level	Master's degree
author	Syed Abas, Sharipah Intan Shafina
author_facet	Syed Abas, Sharipah Intan Shafina
author_sort	Syed Abas, Sharipah Intan Shafina
title	The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
title_short	The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
title_full	The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
title_fullStr	The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
title_full_unstemmed	The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia
title_sort	quality of digital screening & diagnostic mammographic images using standard pgmi criteria in hospital universiti sains malaysia
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Perubatan
publishDate	2015
url	http://eprints.usm.my/39901/1/Dr_Sharipah_Intan_Shafina_Syed_Abas-24_pages.pdf
_version_	1747820777025044480

The quality of digital screening & diagnostic mammographic images using standard PGMI criteria in Hospital Universiti Sains Malaysia

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