Automatic spinal canal detection in lumbar MR images in the sagittal view using dynamic programming

2014 ◽  
Vol 38 (7) ◽  
pp. 569-579 ◽  
Author(s):  
Jaehan Koh ◽  
Vipin Chaudhary ◽  
Eun Kyung Jeon ◽  
Gurmeet Dhillon
Keyword(s):  
Dynamic Programming ◽  
Spinal Canal ◽  
Mr Images

scholarly journals Gravity determines the direction of nerve roots sedimentation in the lumbar spinal canal

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Jun Yang ◽  
Zhiyun Feng ◽  
Nian Chen ◽  
Zhenhua Hong ◽  
Yongyu Zheng ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Mr Imaging ◽  
Spinal Canal ◽  
Ventral Side ◽  
Lateral Position ◽  
Dorsal Side ◽  
Mr Images ◽  
Nerve Roots ◽  
Cross Sectional ◽  
Dural Sac

Abstract Objectives To investigate the role of gravity in the sedimentation of lumbar spine nerve roots using magnetic resonance (MR) imaging of various body positions. Methods A total of 56 patients, who suffered from back pain and underwent conventional supine lumbar spine MR imaging, were selected from sanmen hospital database. All the patients were called back to our hospital to perform MR imaging in prone position or lateral position. Furthermore, the sedimentation sign (SedSign) was determined based on the suspension of the nerve roots in the dural sac on cross-sectional MR images, and 31 cases were rated as positive and another 25 cases were negative. Results The mean age of negative SedSign group was significantly younger than that of positive SedSign group (51.7 ± 8.7 vs 68.4 ± 10.5, P < 0.05). The constitutions of clinical diagnosis were significantly different between patients with a positive SedSign and those with a negative SedSign (P < 0.001). Overall, nerve roots of the vast majority of patients (48/56, 85.7%) subsided to the ventral side of the dural sac on the prone MR images, although that of 8 (14.3%) patients remain stay in the dorsal side of dural sac. Nerve roots of only one patient with negative SedSign did not settle to the ventral dural sac, while this phenomenon occurred in 7 patients in positive SedSign group (4% vs 22.6%, P < 0.001). In addition, the nerve roots of all the five patients subsided to the left side of dural sac on lateral position MR images. Conclusions The nerve roots sedimentation followed the direction of gravity. Positive SedSign may be a MR sign of lumbar pathology involved the spinal canal.

scholarly journals Automated Breast Segmentation of Fat and Water MR Images Using Dynamic Programming

2015 ◽  
Vol 22 (2) ◽  
pp. 139-148 ◽  
Author(s):  
José A. Rosado-Toro ◽  
Tomoe Barr ◽  
Jean-Philippe Galons ◽  
Marilyn T. Marron ◽  
Alison Stopeck ◽  
...  
Keyword(s):  
Dynamic Programming ◽  
Mr Images ◽  
Breast Segmentation

scholarly journals Comparative Study of Imaging Parameters between a New Cervical Full Lamina Back Shift Spinal Canal Enlargement Technique and Single Open-door Laminoplasty for Multisegment Cervical Spondylotic Myelopathy

2020 ◽  
Author(s):  
Xiaonan Wang ◽  
Yibo Zhao ◽  
Xiangdong Lu ◽  
Xiaofeng Zhao ◽  
Detai Qi ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Spinal Canal ◽  
Cervical Spondylotic Myelopathy ◽  
Sectional Area ◽  
Open Door ◽  
Mr Images ◽  
Titanium Plate ◽  
Cross Sectional ◽  
Imaging Parameters ◽  
Canal Enlargement

Abstract Purpose To provide imaging evidence of the feasibility and clinical efficacy of a new full lamina back shift spinal canal enlargement technique by comparing its imaging parameters to those of single open-door miniature titanium plate internal fixation.Methods A retrospective analysis was conducted on 64 patients with multisegment cervical spondylotic myelopathy caused by cervical stenosis. Of these, 32 underwent the new full lamina back shift spinal canal enlargement technique (observation group), and 32 underwent single open-door miniature titanium plate internal fixation (control group). The CT data of both groups were imported into Mimics 17.0 software to measure the median sagittal diameter and cross-sectional area of the spinal canal. Photoshop CS5 was employed to measure the drift distance of the spinal cord on MR images to perform a comparative study of the imaging parameters from the two groups.Results The T2-weighted MR images in both groups showed continuous recovery of the cerebrospinal fluid signal in the C3–C7 range. The new full lamina back shift spinal canal enlargement technique was significantly superior to single open-door miniature titanium plate internal fixation with respect to the spinal canal cross-sectional area and the median sagittal diameter (P<0.05). No significant difference was detected in the drift distance of the spinal cord between the two groups (P>0.05).Conclusion The new full lamina back shift spinal canal enlargement technique achieved a thorough spinal canal decompression effect on imaging while ensuring a reasonable spinal drift distance and few surgical complications. The clinical curative effect of the new technique was precise.

Segmentation of myocardium from cardiac MR images using a novel dynamic programming based segmentation method

2015 ◽  
Vol 42 (3) ◽  
pp. 1424-1435 ◽  
Author(s):  
Xiaohua Qian ◽  
Yuan Lin ◽  
Yue Zhao ◽  
Jing Wang ◽  
Jing Liu ◽  
...  
Keyword(s):  
Dynamic Programming ◽  
Segmentation Method ◽  
Mr Images ◽  
Cardiac Mr

scholarly journals Gravity Determines the Direction of Nerve Roots Sedimentation in the Lumbar Spinal Canal

2020 ◽  
Author(s):  
Jun Yang ◽  
Zhiyun Feng ◽  
Zhenhua Hong ◽  
Jiang Yang ◽  
Tingjie Zhou ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Mr Imaging ◽  
Spinal Canal ◽  
Body Position ◽  
Lateral Position ◽  
Dorsal Side ◽  
Mr Images ◽  
Nerve Roots ◽  
Cross Sectional ◽  
Dural Sac

Abstract Objectives: To investigate the role of gravity in the sedimentation of lumbar spine nerve roots using magnetic resonance (MR) imaging of various body position. Methods: A total of 56 patients suffered from back pain and underwent conventional supine lumbar spine MR imaging were selected from sanmen hospital database. All the patients were called back to our hospital to perform MR imaging in prone position or lateral position. Furthermore, the sedimentation sign (SedSign) was determined based on the suspension of the nerve roots in the dural sac on cross-sectional MR images, and 31 cases were rated as positive and another 25 cases were negative. Results: The mean age of negative SedSign group was significantly younger than that of positive SedSign group (51.7±8.7 vs 68.4±10.5, P<0.05). The constitutions of clinical diagnosis were significantly different between patients with a positive SedSign and those with a negative SedSign (P<0.001). Overall, nerve roots of the vast majority of patients (48/56, 85.7%) subsided to the ventral side of the dural sac on the prone MR images, although that of 8 (14.3%) patients remain stay in the dorsal side of dural sac. Nerve roots of only one patient with negative SedSign did not settle to the ventral dural sac, while this phenomenon occurred in 7 patients in positive SedSign group (4% vs 22.6%, P<0.001). In addition, the nerve roots of all the five patients subsided to the left side of dural sac on lateral position MR images. Conclusions: The nerve roots sedimentation followed the direction of gravity. Positive SedSign, floating of nerve roots in the canal, may be a MR sign of lumbar pathology involved the spinal canal.

scholarly journals Gravity determines the direction of nerve roots sedimentation in the lumbar spinal canal

2021 ◽  
Author(s):  
Jun Yang ◽  
Zhiyun Feng ◽  
Nian Chen ◽  
Zhenhua Hong ◽  
Yongyu Zheng ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Mr Imaging ◽  
Spinal Canal ◽  
Ventral Side ◽  
Lateral Position ◽  
Dorsal Side ◽  
Mr Images ◽  
Nerve Roots ◽  
Cross Sectional ◽  
Dural Sac

Abstract Objectives: To investigate the role of gravity in the sedimentation of lumbar spine nerve roots using magnetic resonance (MR) imaging of various body positions. Methods: A total of 56 patients, who suffered from back pain and underwent conventional supine lumbar spine MR imaging, were selected from sanmen hospital database. All the patients were called back to our hospital to perform MR imaging in prone position or lateral position. Furthermore, the sedimentation sign (SedSign) was determined based on the suspension of the nerve roots in the dural sac on cross-sectional MR images, and 31 cases were rated as positive and another 25 cases were negative. Results: The mean age of negative SedSign group was significantly younger than that of positive SedSign group (51.7±8.7 vs 68.4±10.5, P<0.05). The constitutions of clinical diagnosis were significantly different between patients with a positive SedSign and those with a negative SedSign (P<0.001). Overall, nerve roots of the vast majority of patients (48/56, 85.7%) subsided to the ventral side of the dural sac on the prone MR images, although that of 8 (14.3%) patients remain stay in the dorsal side of dural sac. Nerve roots of only one patient with negative SedSign did not settle to the ventral dural sac, while this phenomenon occurred in 7 patients in positive SedSign group (4% vs 22.6%, P<0.001). In addition, the nerve roots of all the five patients subsided to the left side of dural sac on lateral position MR images. Conclusions: The nerve roots sedimentation followed the direction of gravity. Positive SedSign may be a MR sign of lumbar pathology involved the spinal canal.

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