A new paper documents BoneXpert’s accuracy and self-validation Read more “BoneXpert knows its own limitation”
A questionnaire was sent out to 282 radiologists in Europe using BoneXpert.
The aim was to reveal to what extent radiologists have been replaced by BoneXpert when doing bone age assessment. The result of the survey has now been published as an open access article in Pediatric Radiology. The original questionnaire is in the supplementary information.
The US patent office has granted Visiana a patent for the invention of an image processing method.
A key element of BoneXpert is to locate each bone accurately as a first step in the bone age analysis. Visiana has invented a new method to locate a landmark, e.g. the tip of a bone. About 100 examples are needed for the machine learning method, which trains a decision tree to predict the location from a nearby image patch. The predictions from more than 300 patches are placed in a voting map, and the peak of votes yields the landmark location with subpixel accuracy. The figure shows the voting map for finding the tip of a distal phalanx.
The invention could also be useful in land vehicles and smartphones.
With the implementation of BoneXpert at the University Hospital in Innsbruck in Austria, there are now over 200 departments, who have licensed BoneXpert, each performing between 100 and 6000 analyses per year.
The driving force of this growth of the installed base is the BoneXpert Server Edition with its easy installation, easy maintenance, and excellent workflow
A study published in Journal of the Endocrine Society by Vogiatzi and Ross of Jefferson University Hospital in Philadelphia, followed 90 Klinefelter boys, half of which were treated with Oxandrolone – an anabolic steroid.
(Males have one X and one Y chromosome and females have two X chromosomes. Klinefelter boys have two X and one Y chromosome, i.e. XXY. The incidence Klinefelter Syndrome is 1 of 800 boys.)
Visiana held its BoneXpert webinar to explore the automation of the processes in radiology that is currently taking place in the UK.
Presenters were Professor Amaka Offiah, and Dr. Alistair Calder who presented their views and findings when using BoneXpert in the daily routine at Sheffield University Hospital and at Great Ormond Street Hospital in London.
The webinar was well-attended, and here are a some highlights.
The journal “Bone” brings a new paper entitled “Which skeletal imaging modality is best for assessing bone health in children and young adults compared to DXA? A systematic review and meta-analysis”, by Heba Shalof, Paul Dimitri, Farag Shuweihdi, and Amaka C Offiah.
In April, Kicky van Leeuwen et al presented the paper Artificial intelligence in radiology: 100 commercially available products and their scientific evidence. It got quite some attention, because it documents what many have suspected, namely, that most AI products lack sufficient publications.
Visiana welcomes the South-Eastern Norway Regional Health Authority (Helse Sør Øst) as a BoneXpert customer. Helse Sør Øst includes Norway’s capital Oslo, and the authority provides health care for 56% of Norway’s population.
Around 50 hospitals in Scandinavia are performing more than 100 bone age analyses per year. With the addition of Helse Sør Øst, BoneXpert is licensed to all of these hospitals with the exception of 1 hospital in Norway, 2 in Sweden and 1 in Finland.
A new paper by Suma Uday et al reports the use of BoneXpert to study bone age and BHI in deprived Afghan children of age 1.5-2.5 y. This validates version 3 of BoneXpert, which extends the bone age range down to new-borns – the older version of BoneXpert was valid only down to 2.5 years.