Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

Resumé

Background: Bone density measurements around hip implants are challenged by artifacts and the complex anatomy of the acetabulum. We developed 3D segmentation software and used dual energy CT to reduce artifacts. Purpose / Aim of Study: To test the between-scan agreement and reliability of segmentation software and to compare bone mineral density (BMD) measurements in single- and dual energy CT (SECT and DECT) Materials and Methods: 24 male patients with total hip arthroplasty (12 cemented and 12 uncemented) were scanned and rescanned using SECT and virtual monochromatic DECT images. 3D- ROIs were defined slice-by-slice and BMD was calculated adjacent to the acetabular cup. Findings / Results: Mean BMD for SECT was 411 mg/ccm with a between scan difference of 21 mg/ccm, p=<0.0001 in the uncemented cup. DECT showed a mean BMD of 153 mg/ccm with a difference of 10 mg/ccm, p<0.0001. Around the cemented cup the mean BMD for SECT was 523 mg/ccm with a between-scan difference of 14 mg/ccm, p=0.25 and 186 mg/ccm in DECT with a difference of 6 mg/ccm, p=0.15. ICC was >0.95 with more narrow limits of agreement in DECT compared with SECT. Computed tomography dose index (CTDI) was 25% higher with DECT and subjective image quality was better in SECT. Conclusions: Equally reliable BMD measurements adjacent to acetabular cemented and uncemented cups can be performed using the segmentation software. The absolute between-scan agreement was better in DECT. Virtual monochromatic DECT with fast kVp switching may be beneficial in estimating BMD adjacent to metal implants, but radiation dose and image quality should be taken into consideration. BMD cannot be measured interchangeably with SECT and DECT.
OriginalsprogEngelsk
Publikationsdato25. okt. 2017
Antal sider1
StatusUdgivet - 25. okt. 2017
BegivenhedDansk Ortopædkirurgisk Selskabs Kongres 2017 - SAS Radisson Blu, København, Danmark
Varighed: 25. okt. 201727. okt. 2017
http://www.ortopaedi.dk/dos-kongressen-2017/

Konference

KonferenceDansk Ortopædkirurgisk Selskabs Kongres 2017
LokationSAS Radisson Blu
LandDanmark
ByKøbenhavn
Periode25/10/201727/10/2017
Internetadresse

Emneord

  • CT-scanning
  • Bone density
  • segmenation
  • radiology

Citer dette

Mussmann, B. R., Andersen, P. E., Torfing, T., & Overgaard, S. (2017). Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation. Poster session præsenteret på Dansk Ortopædkirurgisk Selskabs Kongres 2017, København, Danmark.
Mussmann, Bo Redder ; Andersen, Poul Erik ; Torfing, Trine ; Overgaard, Soren. / Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation. Poster session præsenteret på Dansk Ortopædkirurgisk Selskabs Kongres 2017, København, Danmark.1 s.
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title = "Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation",
abstract = "Background: Bone density measurements around hip implants are challenged by artifacts and the complex anatomy of the acetabulum. We developed 3D segmentation software and used dual energy CT to reduce artifacts. Purpose / Aim of Study: To test the between-scan agreement and reliability of segmentation software and to compare bone mineral density (BMD) measurements in single- and dual energy CT (SECT and DECT) Materials and Methods: 24 male patients with total hip arthroplasty (12 cemented and 12 uncemented) were scanned and rescanned using SECT and virtual monochromatic DECT images. 3D- ROIs were defined slice-by-slice and BMD was calculated adjacent to the acetabular cup. Findings / Results: Mean BMD for SECT was 411 mg/ccm with a between scan difference of 21 mg/ccm, p=<0.0001 in the uncemented cup. DECT showed a mean BMD of 153 mg/ccm with a difference of 10 mg/ccm, p<0.0001. Around the cemented cup the mean BMD for SECT was 523 mg/ccm with a between-scan difference of 14 mg/ccm, p=0.25 and 186 mg/ccm in DECT with a difference of 6 mg/ccm, p=0.15. ICC was >0.95 with more narrow limits of agreement in DECT compared with SECT. Computed tomography dose index (CTDI) was 25{\%} higher with DECT and subjective image quality was better in SECT. Conclusions: Equally reliable BMD measurements adjacent to acetabular cemented and uncemented cups can be performed using the segmentation software. The absolute between-scan agreement was better in DECT. Virtual monochromatic DECT with fast kVp switching may be beneficial in estimating BMD adjacent to metal implants, but radiation dose and image quality should be taken into consideration. BMD cannot be measured interchangeably with SECT and DECT.",
keywords = "CT-scanning, Bone density, segmenation, radiology",
author = "Mussmann, {Bo Redder} and Andersen, {Poul Erik} and Trine Torfing and Soren Overgaard",
year = "2017",
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day = "25",
language = "English",
note = "null ; Conference date: 25-10-2017 Through 27-10-2017",
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Mussmann, BR, Andersen, PE, Torfing, T & Overgaard, S 2017, 'Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation', Dansk Ortopædkirurgisk Selskabs Kongres 2017, København, Danmark, 25/10/2017 - 27/10/2017.

Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation. / Mussmann, Bo Redder; Andersen, Poul Erik; Torfing, Trine; Overgaard, Soren.

2017. Poster session præsenteret på Dansk Ortopædkirurgisk Selskabs Kongres 2017, København, Danmark.

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskningpeer review

TY - CONF

T1 - Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation

AU - Mussmann, Bo Redder

AU - Andersen, Poul Erik

AU - Torfing, Trine

AU - Overgaard, Soren

PY - 2017/10/25

Y1 - 2017/10/25

N2 - Background: Bone density measurements around hip implants are challenged by artifacts and the complex anatomy of the acetabulum. We developed 3D segmentation software and used dual energy CT to reduce artifacts. Purpose / Aim of Study: To test the between-scan agreement and reliability of segmentation software and to compare bone mineral density (BMD) measurements in single- and dual energy CT (SECT and DECT) Materials and Methods: 24 male patients with total hip arthroplasty (12 cemented and 12 uncemented) were scanned and rescanned using SECT and virtual monochromatic DECT images. 3D- ROIs were defined slice-by-slice and BMD was calculated adjacent to the acetabular cup. Findings / Results: Mean BMD for SECT was 411 mg/ccm with a between scan difference of 21 mg/ccm, p=<0.0001 in the uncemented cup. DECT showed a mean BMD of 153 mg/ccm with a difference of 10 mg/ccm, p<0.0001. Around the cemented cup the mean BMD for SECT was 523 mg/ccm with a between-scan difference of 14 mg/ccm, p=0.25 and 186 mg/ccm in DECT with a difference of 6 mg/ccm, p=0.15. ICC was >0.95 with more narrow limits of agreement in DECT compared with SECT. Computed tomography dose index (CTDI) was 25% higher with DECT and subjective image quality was better in SECT. Conclusions: Equally reliable BMD measurements adjacent to acetabular cemented and uncemented cups can be performed using the segmentation software. The absolute between-scan agreement was better in DECT. Virtual monochromatic DECT with fast kVp switching may be beneficial in estimating BMD adjacent to metal implants, but radiation dose and image quality should be taken into consideration. BMD cannot be measured interchangeably with SECT and DECT.

AB - Background: Bone density measurements around hip implants are challenged by artifacts and the complex anatomy of the acetabulum. We developed 3D segmentation software and used dual energy CT to reduce artifacts. Purpose / Aim of Study: To test the between-scan agreement and reliability of segmentation software and to compare bone mineral density (BMD) measurements in single- and dual energy CT (SECT and DECT) Materials and Methods: 24 male patients with total hip arthroplasty (12 cemented and 12 uncemented) were scanned and rescanned using SECT and virtual monochromatic DECT images. 3D- ROIs were defined slice-by-slice and BMD was calculated adjacent to the acetabular cup. Findings / Results: Mean BMD for SECT was 411 mg/ccm with a between scan difference of 21 mg/ccm, p=<0.0001 in the uncemented cup. DECT showed a mean BMD of 153 mg/ccm with a difference of 10 mg/ccm, p<0.0001. Around the cemented cup the mean BMD for SECT was 523 mg/ccm with a between-scan difference of 14 mg/ccm, p=0.25 and 186 mg/ccm in DECT with a difference of 6 mg/ccm, p=0.15. ICC was >0.95 with more narrow limits of agreement in DECT compared with SECT. Computed tomography dose index (CTDI) was 25% higher with DECT and subjective image quality was better in SECT. Conclusions: Equally reliable BMD measurements adjacent to acetabular cemented and uncemented cups can be performed using the segmentation software. The absolute between-scan agreement was better in DECT. Virtual monochromatic DECT with fast kVp switching may be beneficial in estimating BMD adjacent to metal implants, but radiation dose and image quality should be taken into consideration. BMD cannot be measured interchangeably with SECT and DECT.

KW - CT-scanning

KW - Bone density

KW - segmenation

KW - radiology

M3 - Poster

ER -

Mussmann BR, Andersen PE, Torfing T, Overgaard S. Single- and dual energy QCT around acetabular cups in total hip arthroplasty using 3-dimensional segmentation. 2017. Poster session præsenteret på Dansk Ortopædkirurgisk Selskabs Kongres 2017, København, Danmark.