Scan at 10mm thickness / 0 spacing at level main pulmonary artery
Do 15 scans, 1 sec interscan delay
Rate: 3ml/sec, Total: 18 ml (6 sec)
Visually pick image with densest contrast
Delay = (Image number) * 2 + 7 seconds i.e., if the 6th image is the densest, than the delay would be (6 * 2) + 7= 19 seconds
[Smartprep does the above for you automatically]

Clinical model for predicting the probability of pulmonary embolus (prior probability)

The American College of Radiology, with more than 30,000 members, is the principal organization of radiologists, radiation oncologists, and clinical medical physicists in the United States. The College is a nonprofit professional society whose primary purposes are to advance the science of radiology, improve service to the patient, study the socioeconomic aspects of the practice of radiology, and encourage continuing education for radiologists, radiation oncologists, medical physicists, and persons practicing in allied professional fields. The American College of Radiology will periodically define new standards for radiologic practice to help advance the science of radiology and to improve the quality of service to patients throughout the United States. Existing standards will be reviewed for revision or renewal as appropriate on their fourth anniversary or sooner, if needed.

Each standard, representing a policy statement by the College, has undergone a thorough consensus process in which it has been subjected to extensive review, requiring the approval of the Commission on Standards and Accreditation as well as the ACR Board of Chancellors, the ACR Council Steering Committee, and the ACR Council. The standards recognize that the safe and effective use of diagnostic and therapeutic radiology requires specific training, skills, and techniques as described in each document.

Reproduction or modification of the published standard by those entities not providing these services is not authorized.

The standards of the American College of Radiology (ACR) are not rules but attempt to define principles of practice which should generally produce high-quality radiological care. The radiologist may exceed an existing standard as determined by the individual patient and available resources. The standards should not be deemed inclusive of all proper methods of care or exclusive of other methods of care reasonably directed to obtaining the same results. The ultimate judgment regarding the propriety of any specific procedure or course of conduct must be made by the radiologist in light of all circumstances presented by the individual situation. Adherence to ACR standards will not assure a successful outcome in every situation. It is prudent to document the rationale for any deviation from these suggested standards in the radiologist's policies and procedures manual or, if not addressed there, in the patients medical record.

ACR Standard for the Performance of Pediatric and Adult Chest Radiography Res. 53- 2001

ACR Standard for the Performance of Pediatric and Adult Bedside Chest Radiography (Portable Chest) Res. 24 - 1997

ACR Standard for the Performance of Thoracic Computed Tomography Res. 4 - 1998

ACR Standard for the Performance of Computed Tomography for the Detection of Pulmonary Embolism in Adults

ACR Standard for the Performance of High Resolution Computed Tomography (HRCT) of the Lungs

Appropriateness Criteria

Expert Panel on Thoracic Imaging

Workup of the Solitary Pulmonary Nodule

Staging of Bronchogenic Carcinoma, Non-Small Cell Lung Carcinoma

Routine Daily Portable X-Ray

Routine Chest Radiographs in Uncomplicated Hypertension

Hemoptysis

Are Rib Films Necessary for Rib Fractures?

Dyspnea

Acute Respiratory Illness

Acute Respiratory Illness in HIV-Positive Patients

Screening for Lung Metastases

Routine Admission and Preoperative Chest Radiography

Lung Cancer Work Group

Staging of Non-Small Cell Lung Carcinoma

Follow-up of Non-Small Cell Lung Cancer

Cham MD, Yankelevitz DF, Shaham D, et al. Deep venous thrombosis: detection by using indirect CT venography. The Pulmonary Angiography-Indirect CT Venography Cooperative Group. Radiology 2000; 216:744-51.
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Yankelevitz DF, Gamsu G, Shah A, et al. Optimization of combined CT pulmonary angiography with lower extremity CT venography. AJR 2000; 174:67-69.
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Loud PA, Katz DS, Klippenstein DL, Shah RD, Grossman ZD. Combined CT venography and pulmonary angiography in suspected thromboembolic disease: diagnostic accuracy for deep venous evaluation. AJR 2000; 174:61-65.
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