mAs = baseline 10% Weekly Obtaining the phantom image: Record numerical mAs values and image Quality Evaluation - quality scores. Dose to = baseline 10% Use of an ACR accreditation phantom. Control showing: Phantom Use a designated QC test cassette of mAs, exposure indicator, Exposure indicator (refer to images and imaging plate that is in routine image quality scores and OD if Appendix 6 of the ACPSEM clinical use. applicable. Position Paper V3.0 for manufacturer dependent Use of a consistent AEC detector A record of at least the last 25 tolerances) position manually selected. results. For hard copy reporting Light contact between the Clearly marked control limits. optical density (OD) in the compression paddle and the Baseline values. background must be in the phantom surface. Radiographic settings (kVp, of 1.6 to 2.0 and the Consistent positioning of the target/filter combination, AEC contrast between the PMMA phantom. detector position, density setting and disc and the background must Consistent selection of clinically source to image distance (SID)). be 0.40 OD. ≥ relevant kVp and target/filter Remarks regarding corrective actions Clearly visualize in an image of an combinations. and baseline changes. ACR accreditation phantom: Selection of the density setting in 5 fibres current clinical use. Dated phantom images from at least the 3.5 groups ( 4 is Consistent time between last six months showing X-ray system and desirable) plate irradiation and readout. radiographic settings. 4 masses. Evaluating the phantom image (preferably on reading workstation or on printed copy if hardcopy reporting used): Use presentation” image with “for zoom and modest adjustment of window/level functions to score fibres and specks.
Quality Evaluation - Phantom images mAs = baseline 10% Dose to = baseline 10% Exposure indicator (refer to Appendix 6 of the ACPSEM Position Paper V3.0 for manufacturer dependent tolerances) For hard copy reporting optical density (OD) in the background must be in the of 1.6 to 2.0 and the contrast between the PMMA disc and the background must be ≥ 0.40 OD. Clearly visualize in an image of an ACR accreditation phantom: 5 fibres 3.5 groups ( 4 is desirable) 4 masses. Weekly Obtaining the phantom image: Use of an ACR accreditation phantom. Use a designated QC test cassette and imaging plate that is in routine clinical use. Use of a consistent AEC detector position manually selected. Light contact between the compression paddle and the phantom surface. Consistent positioning of the phantom. Consistent selection of clinically relevant kVp and target/filter combinations. Selection of the density setting in current clinical use. Consistent time between plate irradiation and readout. Evaluating the phantom image (preferably on reading workstation or on printed copy if hardcopy reporting used): Use “for presentation” image with zoom and modest adjustment of window/level functions to score fibres and specks. Record numerical mAs values and image quality scores. Control showing: of mAs, exposure indicator, image quality scores and OD if applicable. A record of at least the last 25 results. Clearly marked control limits. Baseline values. Radiographic settings (kVp, target/filter combination, AEC detector position, density setting and source to image distance (SID)). Remarks regarding corrective actions and baseline changes. Dated phantom images from at least the last six months showing X-ray system and radiographic settings.
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