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


Cardiology Homepage

Scientists create first 3-D image of the heart’s cardiac conduction system Could help doctors treat cardiac arrhythmia and other conditions

RTI Surgical sells its cardiothoracic closure business to A&E Medical for $60 million Proceeds of sale will go toward paying off term loan

Trial study finds cost-saving alternative for Atrial Fibrillation Cryoballoon ablation can reduce rehospitalizations

Philips relaunches Pioneer Plus catheter with intravascular ultrasound guidance The company had its full market release of the product in May

Researchers develop new PET/CT technique to more accurately diagnose cardiac sarcoidosis Can spot the disease in other organs as well

GE Healthcare unveils Productivity Elevated release of cardiac ultrasound system A 'major upgrade' of its cSound diagnostic suite

German researchers develop new PET tracer for detecting blood clots Could help inform smarter use of anticoagulants

GE Healthcare and HeartFlow collaborate against coronary artery disease Combining GE CT systems with HeartFlow's FFRct Analysis system

Handheld scanner for diagnosing heart disease under development in EU Could drastically reduce the cost for standard approaches

Researchers develop new method for 3-D printing custom heart valve models May help plan surgery and avoid complications

Probe testing: A new and simple test for the integrity of echo ultrasound

By Dr. Nick Dudley
From the March 2017 issue of DOTmed HealthCare Business News magazine

Until recently, it’s been impossible to test the integrity of phased array ultrasound probes used in echocardiography without using expensive electronic probe testers. Other types of probes are easily tested for failure of any of the multiple elements making up the array by looking for “dropout” in the image or in the in-air reverberation pattern, and confirming the fault by running a paper clip along the probe face.

Drop-out is seen as a dark vertical band in the image and as a local reduction in intensity of the reverberation pattern generated by the paper clip.This test doesn’t work for echo probes as every element in the array is active for every ultrasound beam and the beam is steered, masking any drop-out.

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

A new test, recently published in Physics Medica, The European Journal of Medical Physics, solves this problem. Activating Mmode, commonly used for visualizing heart valve motion, turns off the beam steering so that the paper clip test can be used. The Mmode line should be placed centrally in the image. When placed across the array the round cross-section of a paper clip means that contact is restricted to a very small part of the array, ideally a single element at a time. A slow sweep of the paper clip along the array will then reveal any failed elements by a vertical gap (or gaps) in the M-mode reverberation pattern as shown in the image.

The test has been validated using an electronic probe tester which measures the sensitivity of each element in the probe. The number and location of failed elements shown by the probe tester matches exactly the M-mode trace. Studies have shown that failed elements can contribute to misdiagnosis due to the associated reduction in output power and sensitivity. This is a particular problem when using Doppler modes as the Doppler trace used for diagnosis is significantly altered by drop-out. Piloting the test in several echo departments showed that 20 percent of probes were faulty, including one recently repaired probe.

About the author: Dr. Nick Dudley is a medical physicist at Lincoln County Hospital in the U.K. and research director at Multi-Medix Ltd.

Cardiology 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.