Comment on “Pregnancy Screening before Diagnostic Radiography in Emergency Department; an Educational Reviewâ€

With great interest we have read the paper “Pregnancy Screening before Diagnostic Radiography in Emergency Department; an Educational Review†by A.I. Abushouk et al. (1). We agree with the authors that unnecessary fetal radiation exposure should be avoided and that pregnancy screening can be a means to accomplish this. However, in their paper the authors suggest in several instances that radiological imaging during pregnancy can lead to teratogenic effects. In the Abstract it is stated: “Radiation exposure during pregnancy may have serious teratogenic effects to the fetus. Therefore, checking the pregnancy status before imaging women of child bearing age can protect against these effects.â€, and in the Introduction: “Therefore, checking the pregnancy status before imaging women of child bearing age can protect against radiation teratogenic effects.â

Mesozoic subducted slabs under Siberia

Recent results from seismic tomography demonstrate that subducted oceanic lithosphere can be observed globally as slabs of relatively high seismic velocity in the upper as well as lower mantle(1,2). The Asian mantle is no exception, with high-velocity slabs being observed downwards from the west Pacific subduction zones under the Kurile Islands, Japan and farther south(3-5), as well as under Asia's ancient Tethyan margin. Here we present evidence for the presence of slab remnants of Jurassic age that were subducted when the Mongol-Okhotsk and Kular-Nera oceans closed between Siberia, the combined Mongolia-North China blocks and the Omolon block(6-8). We identify these proposed slab remnants in the lower mantle west of Lake Baikal down to depths of at least 2,500 km, where they join what has been interpreted as a 'graveyard'(9) of subducted lithosphere at the bottom of the mantle. Our interpretation implies that slab remnants in the mantle can still be recognized some 150 million years or more after they have been subducted and that such structures may be useful in associating geodynamic to surface-tectonic processes.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/62524/1/397246a0.pd

10 jaar huidige Diagnostische ReferentieNiveaus, een jubileum om te vieren?

In 2022 is het tien jaar geleden dat de vigerende Diagnostische ReferentieNiveaus (DRN’s) werden vastgesteld door de NCS (NCS, 2012). Er is in die tien jaar veel gebeurd: er is onderzoek gedaan in binnen- en buitenland, er zijn praktijkervaringen opgedaan en er zijn nieuwe inzichten ontstaan. De geesten lijken nu rijp te zijn voor een volgende stap: een update van de waarden, methoden en aantallen DRN’s. Dit artikel geeft een overzicht van wat er sinds 2012 in Nederland met de DRN’s is gebeurd en hoe de toekomst van de DRN’s er uit lijkt te gaan zien

Project om kennishiaten MBB'ers te dichten: Verantwoord omgaan met AI

Artikel in Memorad: Kunstmatige Intelligentie (Artificial Intelligence of kortweg AI) heeft de laatste jaren de radiologiewereld ingrijpend veranderd. Ook het werk van Medische Beeldvormings - en Bestralingsdeskundigen (MBB'ers) verandert hierdoor sterk

RADIATION PROTECTION FOR INTERVENTIONAL FLUOROSCOPY: RESULTS OFA SURVEYAMONG DUTCH HOSPITALS

Abstract—A survey was conducted among 20 Dutch hospitals about radiation protection for interventional fluoroscopy. This was a follow-up of a previous study in 2007 that led to several recommendations for radiation protection for interventional fluoroscopy. The results indicate that most recommendations have been followed. However, radiation-induced complications from interventional procedures are still often not recorded in the appropriate register. Furthermore, even though professionals with appropriate training in radiation protection are usually involved in interventional procedures, this often is not the case when these procedures are carried out outside the radiology department. Although this involvement is not required by Dutch law, it is recommended to have radiation protection professionals present more often at interventional procedures. Further improvements in radiation protection for interventional fluoroscopy may come from a comparison of dose-reducing practices among hospitals, the introduction of diagnostic reference levels for interventional procedures, and a more thorough form of screening and follow-up of patient

Publicatielijst Harmen Bijwaard

De publicatielijst bevat alle publicaties waar Harmen Bijwaard aan bijgedragen heeft in de periode 1998 - 201