- Email: [email protected]
Corrigendum to: Screening for breast cancer post reduction mammoplasty [65 (3) 198–205]
498
Correspondence / Corrigendum / Clinical Radiology 65 (2010) 496e498
Re: A CT reconstruction artefact that mimics acute subdural haemorrhage SirdI read with interest the recent letter in the Journal regarding the computed tomography (CT) reconstruction artefact mimicking subdural hemorrhage.1 We have seen this artefact in the past and have written about this previously.2 We had stated in this article that multiplanar reformats using thick-section source images resulted in poorly reconstructed images in other planes with “stair-step” artefacts as the sections are “stacked.” This is accentuated in the specific situation where angled reconstruction of previously reconstructed images is undertaken to correct for patient position. This occurs due to the projection of the “corner” of the stair step into the sections above and below after the images was angled. A detailed explanation with figures is provided in our paper. I agree that this is an artefact to be aware of and recommend that the thin-section source images should be
inspected prior to the reformats. I hope that the reference cited helps to explain the technical reasons for the artefact and how to avoid it.
References 1. Wells IT, Manghat N. Re: A CT reconstruction artefact that mimics acute subdural haemorrhage. Clin Radiol 2009;64:1136e7. 2. Hayes M, Andronikou S, Prabhu S, et al. Multiplanar angled reconstructions of reconstructionsda dangerous practice using multidetector CT. Pediatr Radiol 2006;36:881e3.
Sanjay P. Prabhu* Department of Pediatric Radiology, Children's Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA * Tel.: þ1 6178175509. E-mail address: [email protected] (S.P. Prabhu) Ó 2010 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.crad.2009.12.013
Corrigendum
Corrigendum to: Screening for breast cancer post reduction mammoplasty [65 (3) 198e205] T.M. Muir a, *, J. Tresham b, L. Fritschi c, E. Wylie a a
Royal Perth Hospital, Imaging services, Perth, WA, Australia BreastScreen WA, Perth WA, Australia c Western Australian Institute for Medical Research, QEII Medical Centre, Nedlands, WA, Australia b
The e-mail address of the Guarantor and correspondent was incorrect in the above article. The correct e-mail address is [email protected].
DOI of original article: 10.1016/j.crad.2009.09.015. * Guarantor and correspondent: P. Robinson, Musculoskeletal Centre, X-Ray Department, Chapel Allerton Hospital, Leeds Teaching Hospitals, Leeds LS7 4SA, UK. Tel.: +44 113 3924514; fax: +44 113 3924550. E-mail address: [email protected] (T.M. Muir).
0009-9260/$ e see front matter Ó 2010 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.crad.2010.03.003
Correspondence / Corrigendum / Clinical Radiology 65 (2010) 496e498
Re: A CT reconstruction artefact that mimics acute subdural haemorrhage SirdI read with interest the recent letter in the Journal regarding the computed tomography (CT) reconstruction artefact mimicking subdural hemorrhage.1 We have seen this artefact in the past and have written about this previously.2 We had stated in this article that multiplanar reformats using thick-section source images resulted in poorly reconstructed images in other planes with “stair-step” artefacts as the sections are “stacked.” This is accentuated in the specific situation where angled reconstruction of previously reconstructed images is undertaken to correct for patient position. This occurs due to the projection of the “corner” of the stair step into the sections above and below after the images was angled. A detailed explanation with figures is provided in our paper. I agree that this is an artefact to be aware of and recommend that the thin-section source images should be
inspected prior to the reformats. I hope that the reference cited helps to explain the technical reasons for the artefact and how to avoid it.
References 1. Wells IT, Manghat N. Re: A CT reconstruction artefact that mimics acute subdural haemorrhage. Clin Radiol 2009;64:1136e7. 2. Hayes M, Andronikou S, Prabhu S, et al. Multiplanar angled reconstructions of reconstructionsda dangerous practice using multidetector CT. Pediatr Radiol 2006;36:881e3.
Sanjay P. Prabhu* Department of Pediatric Radiology, Children's Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA * Tel.: þ1 6178175509. E-mail address: [email protected] (S.P. Prabhu) Ó 2010 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.crad.2009.12.013
Corrigendum
Corrigendum to: Screening for breast cancer post reduction mammoplasty [65 (3) 198e205] T.M. Muir a, *, J. Tresham b, L. Fritschi c, E. Wylie a a
Royal Perth Hospital, Imaging services, Perth, WA, Australia BreastScreen WA, Perth WA, Australia c Western Australian Institute for Medical Research, QEII Medical Centre, Nedlands, WA, Australia b
The e-mail address of the Guarantor and correspondent was incorrect in the above article. The correct e-mail address is [email protected].
DOI of original article: 10.1016/j.crad.2009.09.015. * Guarantor and correspondent: P. Robinson, Musculoskeletal Centre, X-Ray Department, Chapel Allerton Hospital, Leeds Teaching Hospitals, Leeds LS7 4SA, UK. Tel.: +44 113 3924514; fax: +44 113 3924550. E-mail address: [email protected] (T.M. Muir).
0009-9260/$ e see front matter Ó 2010 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved. doi:10.1016/j.crad.2010.03.003