DOTmed Home MRI Oncology Ultrasound Molecular Imaging X-Ray Cardiology Health IT Business Affairs
News Home Parts & Service Operating Room CT Women's Health Proton Therapy Endoscopy HTMs Mobile Imaging
Current Location:
> This Story

Log in or Register to rate this News Story
Forward Printable StoryPrint Comment


CT Homepage

CT lung cancer screening combined with smoking cessation is worth expense $14,000 saved per quality-adjusted life-years gained: study

Bracco Imaging acquires SurgVision Enables development of a real-time fluorescence image-guided surgery platform

Study places CT among 10 most over-utilized medical exams... twice Ultrasound also makes the list

Anthem presses forward with new MR, CT reimbursement guidelines An effort to increase usage of free-standing scan facilities

Merry X-Ray acquires Consensys Imaging Service Expands presence in MR, CT and other imaging modality markets

Cone beam CT technology brings 3-D imaging to physicians’ offices A desirable technology for meeting the needs of orthopaedic specialists

Toshiba Medical to showcase its Aquilion LB CT at ASTRO meeting Ideal for bariatric patients

Dr. Linda Pauliks Miller Children's & Women's Hospital Long Beach name medical director of pediatric & congenital cardiac imaging

Children undergoing CT scans for head injuries at risk for radiation overexposure Roughly half of kids visiting ER receive scans

FDA gives nod to Hitachi’s Supria True64 CT System Economy compact model system that consists of a premium image quality chain

Low dose radiation 'likely helps
prevent' cancer: experts

Experts assert no evidence links X-ray or CT to future cancer diagnoses

By Lauren Dubinsky and Gus Iversen

By-and-large, the health care industry is on a mission to reduce radiation exposure to the bare minimum and avoid it entirely whenever possible — but some experts have taken the position that this attitude is misguided and potentially hazardous to patients.

An article published this month in The Journal of Nuclear Medicine makes the case that the nature of radiation exposure is fundamentally misunderstood.

Story Continues Below Advertisement

CT, MRI, NM, SPECT/CT, PET & PET/CT service, refurbished systems and parts

Accelerate your ROI with our Black Diamond Certified refurbished systems. One year warranty - ISO 13485 Certified - FDA registered - Over 65k parts in inventory DOTmed Certified

The confusion goes back at least as far as Hermann Muller's 1946 Nobel Lecture, in which he claimed, “all radiation is harmful, regardless of how low the dose and dose rate.” This way of thinking is known as the linear no-threshold hypothesis (LNTH) and this isn't the first time it's come under fire.

Study author, Jeffry A. Siegel — who is the president and CEO of Nuclear Physics Enterprises, an international nuclear physics consulting firm specializing in clinical trial design for radionuclide therapy agents, regulatory issues, quantitative diagnostic imaging acquisition and analysis, and radiation dosimetry — makes the case that Muller's argument is scientifically invalid.

Although it has repeatedly been shown that the dose-response relationship may reasonably be considered to be linear down to a certain threshold, (i.e. "half as much is half as bad") Siegel and the other authors argue, at a certain point this relationship changes.

"Credible evidence of imaging-related low-dose (<100 mGy) carcinogenic risk is nonexistent; it is a hypothetical risk derived from the demonstrably false LNTH," they wrote. "On the contrary, low-dose radiation does not cause, but more likely helps prevent, cancer."

Some evidence toward the possible benefits of very low radiation dose exposure was published in 2015 in PLOS ONE, where researchers showed that exposing fruit flies to radiation could actually make them live longer.

As Low As Reasonability Achievable, or ALARA, refers to the widely accepted principle that using the minimum necessary radiation dose for CT, X-ray and nuclear medicine imaging exams is the best medicine — and despite a lack of evidence regarding the dangers of low dose — many regulatory policies are based on it.

Siegel's team points to studies that demonstrate the LNTH and ALARA philosophies focus solely on molecular damage and disregard the protective, biological responses that can take place on a very low level.
  Pages: 1 - 2 >>

CT Homepage

You Must Be Logged In To Post A Comment

Increase Your
Brand Awareness
Auctions + Private Sales
Get The
Best Price
Buy Equipment/Parts
Find The
Lowest Price
Daily News
Read The
Latest News
Browse All
DOTmed Users
Ethics on DOTmed
View Our
Ethics Program
Gold Parts Vendor Program
Receive PH
Gold Service Dealer Program
Receive RFP/PS
Healthcare Providers
See all
HCP Tools
A Job
Parts Hunter +EasyPay
Get Parts
Recently Certified
View Recently
Certified Users
Recently Rated
View Recently
Certified Users
Rental Central
Rent Equipment
For Less
Sell Equipment/Parts
Get The
Most Money
Service Technicians Forum
Find Help
And Advice
Simple RFP
Get Equipment
Virtual Trade Show
Find Service
For Equipment
Access and use of this site is subject to the terms and conditions of our LEGAL NOTICE & PRIVACY NOTICE
Property of and Proprietary to, Inc. Copyright ©2001-2017, Inc.