RAD PRO 6 & 7

21問 • 1年前

問題一覧

Occupational Radiation Exposure Dose Limit: General X-ray Activity: not exceed what?

Dose Limit: 20 mSv/yr • General X-ray Activity: not exceed 1 mSv/yr

It contributes to the highest occupational exposure of diagnostic x-ray personnel • Personnel exposure is related directly to the X-ray beam-on time

Fluoroscopy

X-ray Tube Over The Table • Advantage: I • Disadvantage: H • Rationale: H

- image quality - higher personnel exposures - higher levels of scatter & leakage radiation

It is best to position the x-ray tube where during mobile & C-arm fluoroscopy!

UNDER THE PATIENT

In Interventional Radiology ________ receive higher exposures • Rationale: _____ fluoroscopic x-ray beam-on time • Contribute to Higher Exposure: • Absence of ________ • Use of ________ • Dose Limit: ___ mSv/yr

- Personnel - Longer - Protective Curtain - Cineradiography - 500 mSv/yr

must be provided for interventional radiologists

Extremity monitoring

Modality where Personnel exposures are low • Rationale: less scatter radiation due to low kVp operation

Mammography

Modality where Personnel exposures are low • Rationale: • its beam is finely collimated • Only secondary radiation is present in the examination room

CT Scan

Modality where Occupational exposure for nursing personnel & other working in the operating room & intensive care unit is near zero • It is not necessary to provide occupational radiation monitors for such personnel

Surgery

• It contributes to the highest occupational exposure of diagnostic x-ray personnel

Mobile Radiology

Who should wear Occupational Radiation Monitor? RAPP

• Radiologic technologist • Anyone who immobilize or hold patients • Personnel who regularly operate C-arm fluoroscope • Personnel who regularly in the immediate vicinity of C-arm fluoroscope

The dose of radiation that would be expected to produce no significant radiation effects • It has been replaced by dose limits

Maximum Permissible Dose

it is the maximum permissible occupational radiation dose • It is specified only for occupational exposure • Current Required per week

- Dose Limit - 1 mSv/week

Aralin

Radiobiologic Considerations under Dose Dependence • Previously Noted Effects: • Spontaneous Abortion: • In Congenital Abnormalities the Fetal Dose is:

- 200 rad - less than 25 rad (During 1st 2 weeks) - 10 rad

One should never knowing examine a pregnant patient with x-rays unless a documented decision to do so has been made is?

Patient information

Administrative Protocols EPP

- elective booking - patient questionnaires - posting

Biologic response of embryo to radiation 1st 2 weeks • Biologic Response:

resorption of the embryo & no pregnancy

Biologic response of embryo to radiation • 2-10 weeks: major organogenesis • The major organ system of the fetus is developing • Biologic Response:

congenital malformation

Biologic response of embryo to radiation 2nd & 3rd Trimester: • Principal Response:

malignant disease during childhood

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RPC L2

RPC L2

RPC L3