Effective January 1, 2008, the ACR program implemented United States-specific diagnostic reference levels of 75, 25, and 20 mGy, respectively, for the CTDIvol of routine adult head, adult abdominal, and pediatric abdominal CT scans.

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The ACR CT accreditation program uses diagnostic reference levels (and pass-fail criteria) as follows: CTDI vol of 75 mGy (pass-fail criterion, 80 mGy) in the 16-cm phantom for a routine adult head examination, 25 mGy (pass-fail criterion, 30 mGy) in the 32-cm phantom for an adult abdomen examination, and 20 mGy (pass-fail criterion, 25 mGy) in CT dose index (CTDI) (measured in mGy) is a standardized measure of radiation dose output of a CT scanner which allows the user to compare radiation output of different CT scanners. In the past CTDI100 (measured over a 100 mm long ionization cham The 2017 American College of Radiology (ACR) DRLs are provided for different patient size groups and include the size-specific dose estimate (SSDE) concept . The SSDE concept was introduced by the American Society of Physicists in Medicine (AAPM) and corrects the phantom-derived scanner-indicated CTDIvol according to the patient size (8) . CTDIvol is 20 mGy and total length traveled by the x-ray path was 25 cm?

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The ACR has initiated the Dose Index Registry leagues on the ACR CT Accreditation Committee for to automatically collect CTDIvol data directly from their many contributions to the program and this work, the Digital Imaging and Communications in Medi- including Drs. Mark Armstrong, James Brink, Bolivia cine (DICOM) header, thus allowing

For example, the ACR-AAPM Practice Parameter for Diagnostic Reference Levels and Achievable Doses in Medical X-Ray Imaging developed DRLs and ADs from data prior to 2005 for only three adult examinations (head, abdomen and pelvis, and chest). PURPOSE: The aim of this study was to determine, for 3 basic clinical examinations, whether blinded, experienced CT radiologists participating in the ACR's CT Accreditation Program could use scan parameters such as tube current-time product (mAs), tube voltage (kVp), and pitch to predict scanner output settings, expressed as weighted CT dose index (CTDIw) and volume CT dose index (CTDIvol RESULTS: Our local registry had a lower 75th percentile CTDIvol for all protocols than did the individual internationally sourced data. Compared with our study, the ACR dose index registry had higher 75th percentile CTDIvol values by 55% for head, 240% for thorax, 28% for abdomen-pelvis, 42% for thorax-abdomen-pelvis, 128% for pulmonary angiogram, 138% for renal-colic, and 58% for paranasal The scanner reported CTDIvol is an optional field and is not required to be completed if the scanner does not report it.

Radiology Imaging Facility Eligibility Criteria: • Performs LDCT with volumetric CT dose index (CTDIvol) of ≤ 3.0 mGy for standard size patients (defined to be 5’ 7” and approximately 155 pounds) with appropriate reductions in CTDIvol for smaller patients and

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Dose Length Products for the 10 Most Commonly Ordered CT Examinations in Adults: Analysis of Three Years of the ACR Dose Index Registry Journal of the American College of Radiology, Vol. 12, No. 8 Size-Specific Dose Estimates for Evaluation of Individual Patient Dose in CT Protocol for Renal Colic • Performs LDCT with volumetric CT dose index (CTDIvol) of ≤ 3.0 mGy for standard size patients (defined to be 5’ 7” and approximately 155 pounds) with appropriate reductions in CTDIvol for smaller patients and appropriate increases in CTDIvol for larger patients; • Utilizes a standardized lung nodule identification, classification and Employing external vs internal medical physicists was associated with increased odds of exceeding ACR CTDIvol guidelines (OR, 6.1; 95% CI, 1.8-20.8). Having medical physicists establish protocols was associated with decreased odds of exceeding 75th percentile of registry CTDIvol (OR, 0.09; 95% CI, 0.01-0.59).
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CTDIvol reported by scanner (mGy) for the protocol entered in the phantom site scanning data form (using 32-cm diameter PMMA phantom) ☐ Other ☐ 70 kV ☐ 135 kV Nmax: Maximum number of axial images able to be acquired simultaneously in one rotation: ACR CT Accreditation Phantom Site Scanning Data Form 1

Please be aware, special attention must be paid to scanner output (CTDIvol) for pediatric studies. The facility will not receive a pass if the radiation dose is perceived to be too high, regardless of ACR CT dose metrics requirement for CTDIvol of 3.0 mGy for a standard size normal BMI patient was still met in our population for all groups of patients including the obese.

CTDI data quantify the amount of radiation that is used to perform a given CT College of Radiology (ACR) CT accreditation program uses CTDIvol values 

beräkningarna med det beräknade medeltalet av CTDIvol per skanning och rapport över stråldos (RDSR) som skickats till ACR och nyans. electrolyte and oil based large ACR phantoms. Diskussion kring för CTDI.

There are no absolute contraindications to screening thoracic CT. As with all procedures, the relative benefits and ACR CT Accreditation Program Image Quality Phantom and Dose Measurements Tom Payne PhD 1 Cynthia H. McCollough PhD 2 1.