2024-03-29T15:59:23Z
http://eprints.drcmr.dk/cgi/oai2
oai:www.drcmr.dk:3
2010-04-02T00:05:17Z
7374617475733D707562
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7375626A656374733D493032:49303278393033
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
74797065733D7465616368696E675F7265736F75726365
Introduktion til teknikken bag MR-skanning
Hanson, Lars G.
Teaching
Magnetic Resonance Imaging
Medical Illustration
Magnetic Resonance Spectroscopy
Man kan optage billeder med en MR-skanner uden at forstå princippet bag, men det kræver forståelse at opsøge de rette parametre og målemetoder, og at fortolke billeder og artefakter. Teksten her udgør en introduktion til teknikken bag magnetisk resonans (MR) skanning. Dele er møntet på begyndere med et minimum af teknisk baggrund, mens andre dele sigter lidt højere. Dette afspejler, at noterne er skrevet i forbindelse med undervisning af personer med blandet baggrund.
DRCMR homepage
2004
Teaching Resource
NonPeerReviewed
application/pdf
http://eprints.drcmr.dk/3/1/Intro.pdf
http://www.drcmr.dk/Intro.pdf
Hanson, Lars G. (2004) Introduktion til teknikken bag MR-skanning. [Teaching Resource]
http://eprints.drcmr.dk/3/
oai:www.drcmr.dk:10
2008-06-28T18:38:09Z
7374617475733D707562
7375626A656374733D493032:49303278393033
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030:4A303178383937783238307835303078343830
74797065733D61727469636C65
A graphical simulator for teaching basic and advanced MR imaging techniques.
Hanson, Lars G.
Teaching
Magnetic Resonance Imaging
Medical Illustration
Teaching of magnetic resonance (MR) imaging techniques typically involves considerable handwaving, literally, to explain concepts such as resonance, rotating frames, dephasing, refocusing, sequences, and imaging. A proper understanding of MR contrast and imaging techniques is crucial for radiologists, radiographers, and technical staff alike, but it is notoriously challenging to explain spin dynamics by using traditional teaching tools. The author developed a freely available graphical simulator based on the Bloch equations to aid in the teaching of topics ranging from precession and relaxation to advanced concepts such as stimulated echoes, spin tagging, and k-space-methods. A graphical user interface provides the user with a three-dimensional view of spin isochromates that can be manipulated by selecting radiofrequency pulses and gradient events. Even complicated sequences can be visualized in an intuitive way. The cross-platform software is primarily designed for use in lectures, but is also useful for self studies and student assignments. Movies available at http://radiographics.rsnajnls.org/cgi/content/full/e27/DC1.
Radiological Society of North America, Inc (RSNA)
2007-08-10
Article
PeerReviewed
http://radiographics.rsnajnls.org/cgi/content/abstract/27/6/e27
Hanson, Lars G. (2007) A graphical simulator for teaching basic and advanced MR imaging techniques. Radiographics, 27 (6). e27. ISSN 1527-1323
http://eprints.drcmr.dk/10/
oai:www.drcmr.dk:22
2010-04-02T00:05:34Z
7374617475733D707562
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
7375626A656374733D493032:49303278393033:4930327839303378333032
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030:4A303178383937783238307835303078343830
74797065733D61727469636C65
Is Quantum Mechanics necessary for understanding Magnetic Resonance?
Hanson, Lars G.
Models, Educational
Magnetic Resonance Imaging
Medical Illustration
Magnetic Resonance Spectroscopy
Educational material introducing magnetic resonance typically contains sections on the underlying principles. Unfortunately the explanations given are often unnecessarily complicated or even wrong. Magnetic resonance is often presented as a phenomenon that necessitates a quantum mechanical explanation whereas it really is a classical effect, i.e. a consequence of the common sense expressed in classical mechanics. This insight is not new, but there have been few attempts to challenge common misleading explanations, so authors and educators are inadvertently keeping myths alive. As a result, new students' first encounters with magnetic resonance are often obscured by explanations that make the subject difficult to understand. Typical problems are addressed and alternative intuitive
explanations are provided.
Wiley InterScience
2008-09-03
Article
PeerReviewed
application/pdf
http://eprints.drcmr.dk/22/1/article.pdf
image/jpeg
http://eprints.drcmr.dk/22/2/MagSpherical2crop.jpg
image/jpeg
http://eprints.drcmr.dk/22/3/MagPrecession2.jpg
image/jpeg
http://eprints.drcmr.dk/22/4/MagEquilib2.jpg
image/jpeg
http://eprints.drcmr.dk/22/5/MagRotated2.jpg
http://www3.interscience.wiley.com/journal/121394126/abstract
Hanson, Lars G. (2008) Is Quantum Mechanics necessary for understanding Magnetic Resonance? Concepts in Magnetic Resonance Part A, 32A (5). pp. 329-340. ISSN 1546-6086
http://eprints.drcmr.dk/22/
oai:www.drcmr.dk:28
2010-04-02T00:05:41Z
7374617475733D707562
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D493032:49303278393033
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030:4A303178383937783238307835303078343830
74797065733D7465616368696E675F7265736F75726365
Introduktion til teknikken bag MR-skanning
Hanson, Lars G.
Teaching
Magnetic Resonance Imaging
Medical Illustration
Magnetic Resonance Spectroscopy
Man kan optage billeder med en MR-skanner uden at forstå princippet bag, men det kræver forståelse at opsøge de rette parametre og målemetoder, og at fortolke billeder og artefakter. Teksten her udgør en introduktion til teknikken bag magnetisk resonans (MR) skanning. Dele er møntet på begyndere med et minimum af teknisk baggrund, mens andre dele sigter lidt højere. Dette afspejler, at noterne er skrevet i forbindelse med undervisning af personer med blandet baggrund.
DRCMR homepage
2009-01-23
Teaching Resource
NonPeerReviewed
application/pdf
http://eprints.drcmr.dk/28/4/Intro.pdf
http://www.drcmr.dk/Intro.pdf
Hanson, Lars G. (2009) Introduktion til teknikken bag MR-skanning. [Teaching Resource]
http://eprints.drcmr.dk/28/
oai:www.drcmr.dk:33
2010-04-02T08:42:07Z
7374617475733D707562
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D493032:49303278393033
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030:4A303178383937783238307835303078343830
74797065733D7465616368696E675F7265736F75726365
Introduktion til teknikken bag MR-skanning
Hanson, Lars G.
Teaching
Magnetic Resonance Imaging
Medical Illustration
Magnetic Resonance Spectroscopy
Man kan optage billeder med en MR-skanner uden at forstå princippet bag, men det kræver forståelse at opsøge de rette parametre og målemetoder, og at fortolke billeder og artefakter. Teksten her udgør en introduktion til teknikken bag magnetisk resonans (MR) skanning. Dele er møntet på begyndere med et minimum af teknisk baggrund, mens andre dele sigter højere. Dette afspejler, at noterne er skrevet i forbindelse med undervisning af personer med blandet baggrund.
DRCMR homepage
2009-05-26
Teaching Resource
NonPeerReviewed
application/pdf
http://eprints.drcmr.dk/33/3/Intro.pdf
http://www.drcmr.dk/Intro.pdf
Hanson, Lars G. (2009) Introduktion til teknikken bag MR-skanning. [Teaching Resource]
http://eprints.drcmr.dk/33/
oai:www.drcmr.dk:37
2010-04-02T00:05:51Z
7374617475733D707562
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030:4A303178383937783238307835303078343830
7375626A656374733D493032:49303278393033
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
74797065733D7465616368696E675F7265736F75726365
Introduction to Magnetic Resonance Imaging Techniques
Hanson, Lars G.
Teaching
Magnetic Resonance Imaging
Medical Illustration
Magnetic Resonance Spectroscopy
It is quite possible to acquire images with an MR scanner without understanding the principles behind it, but choosing the best parameters and methods, and interpreting images and artifacts, requires understanding. This text serves as an introduction to magnetic resonance imaging techniques. It is aimed at beginners in possession of only a minimal level of technical expertise, yet it introduces aspects of MR that are typically considered technically challenging. The notes were written in connection with teaching of audiences with mixed backgrounds.
2009-08-31
Teaching Resource
NonPeerReviewed
application/pdf
http://eprints.drcmr.dk/37/1/MRI_English_a4.pdf
application/pdf
http://eprints.drcmr.dk/37/2/MRI_English_letter.pdf
Hanson, Lars G. (2009) Introduction to Magnetic Resonance Imaging Techniques. [Teaching Resource]
http://eprints.drcmr.dk/37/
oai:www.drcmr.dk:41
2010-09-19T08:32:43Z
7374617475733D707562
7375626A656374733D4A3031:4A303178383937
7375626A656374733D453031:45303178333730:4530317833373078333530:453031783337307833353078353030
74797065733D61727469636C65
MR-skanning ved 7 tesla feltstyrke etableres i Danmark
Hanson, Lars G.
Magnetic Resonance Imaging
Technology
Igennem længere tid har en bred kreds
af forskere og klinikere på hospitaler
og universiteter [1] forsøgt at rejse de
nødvendige midler til at etablere ultrahøjfelts
MR-skanning i Danmark. I juni
2010 udløstes jubel, da “the John and
Birthe Meyer Foundation” meget generøst
bevilgede 38,6 Mkr til indkøb af en
human MR-skanner med en feltstyrke
på 7 tesla. Dette svarer til cirka 140
tusind gange jordens magnetfelt hvilket
mere end fordobler hospitalernes
hidtil kraftigste felter. Bevillingen supplerede
offentlig støtte på 27,4 Mkr fra
Forsknings- og Innovationsstyrelsens
infrastrukturmidler, og dermed er den
nødvendige kapital til etablering af en
7T facilitet ved MR-forskningscentret på
Hvidovre Hospital tilvejebragt. Ultimo
2011 kan brugere af MR-skanning i
Danmark se frem til væsentligt forbedrede
undersøgelser på en række områder,
og nye typer målinger, som ikke
er mulige ved lavere felt. Med fokus på
tekniske forhold beskrives her de unikke
muligheder og udfordringer, som skanning
ved 7T feltstyrke afstedkommer.
Der tages udgangspunkt i en kort generel
beskrivelse af MR.
Scanpublisher A/S
2010-08
Article
NonPeerReviewed
application/pdf
http://eprints.drcmr.dk/41/1/7T_Hanson_MTI_p20_n4_2010.pdf
http://www.e-pages.dk/scanpub/202/
Hanson, Lars G. (2010) MR-skanning ved 7 tesla feltstyrke etableres i Danmark. MTI - Medicinsk Teknologi & Informatik, 7 (4). pp. 20-22. ISSN 1901-4465
http://eprints.drcmr.dk/41/
oai:www.drcmr.dk:43
2011-05-21T23:06:52Z
7374617475733D707562
7375626A656374733D483031:48303178363731:4830317836373178353739:483031783637317835373978363331
7375626A656374733D493032:49303278393033:4930327839303378333032
7375626A656374733D4A3031:4A303178383937:4A30317838393778323830:4A3031783839377832383078353030
74797065733D7465616368696E675F7265736F75726365
Oplæg til gymnasie-øvelse i Magnetisk Resonans
Hanson, Lars G
Magnetic Resonance Spectroscopy
Models, Educational
Audiovisual Aids
Nærværende oplæg giver inspiration til et fysisk/kemisk gymnasie-forløb omhandlende magnetisk resonans (MR), som er et fænomen, der anvendes i medicinsk diagnostik og forskning (MR-skanning) og kemisk analyse (NMR-spektroskopi). Disse fascinerende metoder er baseret på brug af magnetisme, radiobølger, kernefysik og gyro-mekanik, men er grundlæggende ikke mere komplicerede end at de kan forstås intuitivt af elever med klassisk mekanisk intuition og et basalt kendskab til elektromagnetisme.
2011-04
Teaching Resource
NonPeerReviewed
application/msword
http://eprints.drcmr.dk/43/1/MagnetiskResonansVejledning.doc
http://www.drcmr.dk/JavaCompass
Hanson, Lars G (2011) Oplæg til gymnasie-øvelse i Magnetisk Resonans. [Teaching Resource]
http://eprints.drcmr.dk/43/