En sammenligning af DECT rekonstuktioner, for optimal billedkvalitet for indtegning af lymfeknuder, i forbindelse med strålebehandling mod c.mammae

Julie Holbæk, Jacob Skønborg Sandholdt, May-Lin Martinsen, Maria Fuglsang Jensen, Ole Nørrevang, Helle Precht, Lihn Thai, Ihsan Bahij

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

Abstract

Purpose: The purpose of this study is to examine at which kV, the optimal image quality for contouring lymph nodes often radiated in c. mamma patients can be obtained, utilizing a DECT scanner with virtual monoenergetic reconstructions.
Method: DECT scans of 5 head-neck patients were utilized, with scan lengths including relevant lymph node regions, typically contoured in c. mamma patients. Each patient was scanned with a Twin-Beam DECT protocol. The scans were reconstructed into five image sets of 50 kV, 70 kV, 90 kV, 110 kV and 130 kV. Two blinded VGA
studies were performed by five oncologists, to determine the best image quality to contour lymph nodes on. One VGA was presented with no contours, and the other with specific regional lymphatics contours (level 2, 3, 4 axilla, IMN and interpectoralis). SNR and CNR were measured in each reconstruction, and evaluated in relation to VGA scores. Kappa statistics were applied, to measure both inter- and intrarater reliability amongst the participating oncologists, and to reflect if the contours influenced their perception of good image quality.
Results: In both VGA studies, 70 kV was ranked the highest by the five oncologists, with 50 and 90 kV scoring marginally lower. CNR and SNR values peaked at 70 and 90 kV respectively.
Bidragets oversatte titelEn sammenligning af DECT rekonstuktioner, for optimal billedkvalitet for indtegning af lymfeknuder, i forbindelse med strålebehandling mod c.mammae
OriginalsprogEngelsk
Publikationsdato11 apr. 2021
StatusUdgivet - 11 apr. 2021
BegivenhedNordic Assosciation for Clinical Physics: NACP 2020/21 Symposium - Online
Varighed: 11 apr. 202113 apr. 2021
https://www.efomp.org/index.php?r=events/view&id=140

Konference

KonferenceNordic Assosciation for Clinical Physics
LokationOnline
Periode11/04/2113/04/21
Internetadresse

Emneord

  • Kliniske undersøgelsesmetoder, laboratorieteknologi og radiografi

Citationsformater