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تعداد آیتم قابل مشاهده باقیمانده : 3 مورد
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Fetal radiation doses associated with common radiologic examinations

Fetal radiation doses associated with common radiologic examinations
Type of examination Fetal dose* (mGy)
Very low-dose examinations (<0.1 mGy)
Cervical spine radiography (anteroposterior and lateral views) <0.001
Radiography of any extremity <0.001
Mammography (two views) 0.001 to 0.01
Chest radiography (two views) 0.0005 to 0.01
Low- to moderate-dose examinations (0.1 to 10 mGy)
Radiography
Abdominal radiography 0.1 to 3.0
Lumbar spine radiography 1.0 to 10
Intravenous pyelography 5 to 10
Double-contrast barium enema 1.0 to 20
CT
Head or neck CT 1.0 to 10
Chest CT or CT pulmonary angiography 0.01 to 0.66
Limited CT pelvimetry (single axial section through the femoral heads) <1
Nuclear medicine
Low-dose perfusion scintigraphy 0.1 to 0.5
Technetium-99m bone scintigraphy 4 to 5
Pulmonary digital subtraction angiography 0.5
Higher-dose examinations (10 to 50 mGy)
Abdominal CT 1.3 to 35
Pelvic CT 10 to 50
18F PET/CT whole-body scintigraphy 10 to 50
Annual average background radiation = 1.1 to 2.5 mGy.
CT: computed tomography; PET: positron emission tomography; 18F: 2-[fluorine-18]fluoro-2-deoxy-D-glucose.
* Fetal exposure varies with gestational age, maternal body habitus, and exact parameters.
Reproduced with permission from: Tremblay E, Thérasse E, Thomassin-Naggara I, Trop I. Quality initiatives: guidelines for use of medical imaging during pregnancy and lactation. Radiographics 2012; 32:897. Copyright © 2012 RSNA.
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