We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |


Shields Warren, M.D.
JAMA. 1956;162(5):464-468. doi:10.1001/jama.1956.72970220006007.
Text Size: A A A
Published online


Data bearing on effects of prolonged low-level exposure of man to ionizing radiation are few. With the use of atomic energy becoming more general and the increasing probability of large portions of the population becoming potentially exposed to radiation, the value of such data materially increases. I add herewith some observations. Radiologists and certain other groups of medical specialists, such as dermatologists, urologists, and gastroenterologists, have experienced prolonged occupational exposure near or sometimes slightly above the present permissible levels of radiation. While some of the pioneers in radiology risked themselves freely, paying with radiation-induced leukemia or carcinoma for their absorption in their new and untried tool to aid humanity, most of those utilizing ionizing radiation in their medical work have received only small doses.

Dose Levels of Irradiation  The present permissible level of total body radiation accepted by the International Committee on Radiation Protection for x-rays or gamma rays of


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.