- Title
- Effect of exposure charts on reject rate of extremity radiographs
- Creator
- Kalondo, Luzanne
- Subject
- Radiography, Medical -- Exposure
- Subject
- Radiography, Medical -- Image quality
- Subject
- Radiography, Medical -- South Africa
- Subject
- Diagnostic imaging -- South Africa
- Date Issued
- 2010
- Date
- 2010
- Type
- Thesis
- Type
- Masters
- Type
- MTech
- Identifier
- vital:10076
- Identifier
- http://hdl.handle.net/10948/1168
- Identifier
- Radiography, Medical -- Exposure
- Identifier
- Radiography, Medical -- Image quality
- Identifier
- Radiography, Medical -- South Africa
- Identifier
- Diagnostic imaging -- South Africa
- Description
- This study discusses reject film analyses (RFAs) before and after the implementation of a quality improvement intervention. RFAs were undertaken to investigate the effect of the introduction and use of exposure charts (ECs) on department and student reject rates of extremity radiographs. Methods: A quantitative comparative pre and post-treatment research design was used. Data was collected from the x-ray departments of two training hospitals in Windhoek, Namibia over a five month period. A retrospective RFA was conducted to determine the department and student reject rates for both departments before intervention. Emphasis was placed on exposure related reject films. ECs were compiled and introduced at Katutura State Hospital (venue B) by the researcher. The students were instructed to use these charts. At Windhoek Central Hospital (venue A) no ECs were used. A prospective RFA was conducted to establish department and student reject rates at both hospitals after the intervention at venue B. Results: During the retrospective phase the department reject rate for venue A was 21 percent while the student reject rate was 23 percent. At venue B 24 percent and 26 percent were scored respectively. Students at venue A produced rejected radiographs due to overexposure (49 percent) and underexposure (23 percent), whilst 37 percent was recorded for both causes at venue B. At venue A, 35 percent of films were rejected due to incorrect mAs selection, at venue B the figure was 42 percent. Undiagnostic radiographs due to inaccurate kV selection comprised 62 percent for venue A and 59 percent for venue B. During the prospective phase the department reject rate for venue A was 20 percent and that of the students was 19 percent. For venue B 12 percent and 11 percent were scored respectively. At venue A radiographs rejected due to over and underexposure were 43 percent and 33 percent respectively while those at venue B were 33 percent and 34 percent. Incorrect mAs selection caused 33 percent of discarded films at venue A and 38 percent at venue B. The figures for inaccurate kV selection were 68 percent and 62 percent for venues A and B. Conclusions: The introduction and use of ECs lowered the student reject rate at venue B in the prospective phase.
- Format
- xiv, 151 leaves ; 31 cm
- Format
- Publisher
- Nelson Mandela Metropolitan University
- Publisher
- Faculty of Health Sciences
- Language
- English
- Rights
- Nelson Mandela Metropolitan University
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