Measurement of Spinous Process Angles on Ultrasound Spine Images using HR-Net Method

2021 ◽  
Author(s):  
Wenjie Shao ◽  
Hongye Zeng ◽  
Yuchong Gao ◽  
Kang Zhang ◽  
Rui Zheng
Keyword(s):  
Spinous Process ◽  
Net Method

C1-C2 Wiring With Timed Self-Obsolescence for Complex C2 Body Fracture

2021 ◽  
Author(s):  
William W Wroe ◽  
Bradley Budde ◽  
Joseph C Hsieh
Keyword(s):  
Range Of Motion ◽  
Clinical Presentation ◽  
Spinous Process ◽  
Lateral Mass ◽  
Novel Technique ◽  
Internal Stabilization ◽  
Body Fracture ◽  
Permanent Loss ◽  
Osteosynthesis Techniques ◽  
Lateral Mass Fracture

Abstract BACKGROUND AND IMPORTANCE Fractures of C2 are typically managed nonoperatively with good rates of healing. Management decisions are complicated, however, when there are additional fractures in the axis possibly leading to increased instability. Additionally, the techniques used for treating these unstable axis fractures can have either significant complications or permanent loss of range of motion. Here, we present a novel technique for the reduction and stabilization of complex C2 body fracture. CLINICAL PRESENTATION A 34-yr-old woman with a complex C2 body fracture, which included a right pars and left lateral mass fracture, presented after a water slide accident. It was felt that this fracture was both unstable and would not heal in an anatomically acceptable way so an open surgical reduction was needed. After consideration of more traditional fusion and osteosynthesis techniques, we chose to perform a C1-C2 internal stabilization with C1 sublaminar and C2 spinous process wiring. The patient was then instructed to wear a Miami J collar for 3 mo. CONCLUSION The outcome was favorable with good approximation and healing with preserved range of motion.

Sparse damage detection via the elastic net method using modal data

2021 ◽  
pp. 147592172110219
Author(s):  
Rongrong Hou ◽  
Xiaoyou Wang ◽  
Yong Xia
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Damage Identification ◽  
Measurement Data ◽  
Elastic Net ◽  
Sensitivity Matrix ◽  
Regularization Technique ◽  
Modal Data ◽  
Regularization Techniques ◽  
Net Method

The l1 regularization technique has been developed for damage detection by utilizing the sparsity feature of structural damage. However, the sensitivity matrix in the damage identification exhibits a strong correlation structure, which does not suffice the independency criteria of the l1 regularization technique. This study employs the elastic net method to solve the problem by combining the l1 and l2 regularization techniques. Moreover, the proposed method enables the grouped structural damage being identified simultaneously, whereas the l1 regularization cannot. A numerical cantilever beam and an experimental three-story frame are utilized to demonstrate the effectiveness of the proposed method. The results showed that the proposed method is able to accurately locate and quantify the single and multiple damages, even when the number of measurement data is much less than the number of elements. In particular, the present elastic net technique can detect the grouped damaged elements accurately, whilst the l1 regularization method cannot.

scholarly journals Combining 3D Structured Light Imaging and Spine X-ray Data Improves Visualization of the Spinous Lines in the Scoliotic Spine

2020 ◽  
Vol 11 (1) ◽  
pp. 301
Author(s):  
Sławomir Paśko ◽  
Wojciech Glinkowski
Keyword(s):  
Radiation Exposure ◽  
Surface Topography ◽  
Structured Light ◽  
Spinous Process ◽  
Three Dimensional ◽  
Diagnostic System ◽  
Measurement Tool ◽  
Adequate Treatment ◽  
X Ray ◽  
Spinous Processes

Scoliosis is a three-dimensional trunk and spinal deformity. Patient evaluation is essential for the decision-making process and determines the selection of specific and adequate treatment. The diagnosis requires a radiological evaluation that exposes patients to radiation. This exposure reaches hazardous levels when numerous, repetitive radiographic studies are required for diagnostics, monitoring, and treatment. Technological improvements in radiographic devices have significantly reduced radiation exposure, but the risk for patients remains. Optical three-dimensional surface topography (3D ST) measurement systems that use surface topography (ST) to screen, diagnose, and monitor scoliosis are safer alternatives to radiography. The study aimed to show that the combination of plain X-ray and 3D ST scans allows for an approximate presentation of the vertebral column spinous processes line in space to determine the shape of the spine’s deformity in scoliosis patients. Twelve patients diagnosed with scoliosis, aged 13.1 ± 4.5 years (range: 9 to 20 years) (mean: Cobb angle 17.8°, SD: ±9.5°) were enrolled in the study. Patients were diagnosed using full-spine X-ray and whole torso 3D ST. The novel three-dimensional assessment of the spinous process lines by merging 3D ST and X-ray data in patients with scoliosis was implemented. The method’s expected uncertainty is less than 5 mm, which is better than the norm for a standard measurement tool. The presented accuracy level is considered adequate; the proposed solution is accurate enough to monitor the changes in the shape of scoliosis’s spinous processes line. The proposed method allows for a relatively precise calculation of the spinous process lines based on a three-dimensional point cloud obtained with a four-directional, three-dimensional structured light diagnostic system and a single X-ray image. The method may help reduce patients’ total radiation exposure and avoid one X-ray in the sagittal projection if biplanar radiograms are required for reconstructing the three-dimensional line of the spinous processes line.

Posterior Lumbar Interbody Fusion Using an En-Bloc Resected Lamina as an Interbody Spacer in Combination with Spinal Instruments

1998 ◽  
Vol 02 (04) ◽  
pp. 325-332
Author(s):  
Shigeru Hirabayashi ◽  
Kiyoshi Kumano ◽  
Takeshi Uchida
Keyword(s):  
Interbody Fusion ◽  
Spinous Process ◽  
Degenerative Spondylolisthesis ◽  
Spinal Instrumentation ◽  
Posterior Lumbar Interbody Fusion ◽  
Bony Union ◽  
Lumbar Interbody Fusion ◽  
En Bloc ◽  
Time Of Operation

We developed a new method of posterior lumbar interbody fusion (PLIF) using an en-bloc resected lamina with or without a hydroxyapatite block as an interbody spacer instead of auto-iliac bone, in combination with rigid-type spinal instrumentation. The purpose of this study was to evaluate the effectiveness of our method. There were 23 patients (13 males, 10 females, age at the time of operation: 21–71 years, mean 50.5 years; follow-up: 1–4 years, mean 2 years and 3 months). In 10 patients with spondylolitic spondylolisthesis and 3 patients with spondylolysis, the floating lamina was resected enbloc by mid-line splitting. In 7 patients with degenerative spondylolisthesis and 3 patients with unstable spine, a cleavage was made at the isthmus and then the complex of lamina and inferior spinous process was resected en-bloc. Seventeen patients with olisthesis underwent reduction. PLIF was performed at the L4/L5 level in 10 patients and the L5/S1 level in 13 patients. Sixteen patients with preoperative low back pain recovered, except for one patient with instability at the adjacent vertebra. All of the seven patients with preoperative gait disturbance recovered. The ratio of olisthesis changed from preoperative 30% to postoperative 18% on average. Good bony union was obtained in both the patients with and those without a hydroxyapatite spacer. Posterior lumbar interbody fusion using an en-bloc resected lamina as an interbody spacer in combination with rigid-type spinal instrumentation was useful.

A rare case of malignant nonfunctional retroperitoneal paraganglioma with C3 spinous process metastasis

2016 ◽  
Vol 16 (2) ◽  
pp. e7-e8
Author(s):  
Tingxian Ling ◽  
Longbing Ma ◽  
Limin Liu ◽  
Yueming Song
Keyword(s):  
Rare Case ◽  
Spinous Process

scholarly journals A fixed net method to determine the vertical migration of plankton

1976 ◽  
Vol 21 (6) ◽  
pp. 920-922 ◽  
Author(s):  
Richard V. Bovbjerg ◽  
Judy Freitag ◽  
Dana McHaney
Keyword(s):  
Vertical Migration ◽  
Net Method

scholarly journals Multi-level isolated spinous process fractures with delayed deterioration observed radiographically: A case report

2016 ◽  
Vol 3 ◽  
pp. 3-5
Author(s):  
Masatoshi Yunoki ◽  
Kenta Suzuki ◽  
Atsuhito Uneda ◽  
Shuichi Okubo ◽  
Koji Hirashita ◽  
...  
Keyword(s):  
Case Report ◽  
Spinous Process ◽  
Multi Level

scholarly journals Spinous process fractures in osteoporotic thoracolumbar vertebral fractures

2011 ◽  
Vol 84 (1007) ◽  
pp. 1046-1049 ◽  
Author(s):  
M R N Seo ◽  
S Y Park ◽  
J S Park ◽  
W Jin ◽  
K N Ryu
Keyword(s):  
Vertebral Fractures ◽  
Spinous Process

Isolated symptomatic cervical spinous process fracture requiring surgery

1991 ◽  
Vol 75 (1) ◽  
pp. 131-133 ◽  
Author(s):  
Leonard F. Hirsh ◽  
Luis E. Duarte ◽  
Eric H. Wolfson ◽  
Wilhelm Gerhard
Keyword(s):  
Medical Condition ◽  
Spinous Process ◽  
Complete Recovery ◽  
Neurological Injury ◽  
Pertinent Literature ◽  
Content Type ◽  
Residual Symptoms ◽  
Economic Forces ◽  
Spinous Process Fracture ◽  
Fine Print

✓ Isolated cervical spinous process fractures are common, but are usually considered to be inconsequential. Although such fractures may produce pain, complete recovery without residual symptoms is expected after conservative treatment, and neurological injury does not usually occur. The case of a patient with a persistently symptomatic C-2 spinous process fracture that required surgical treatment for pain relief is reported. A review of the pertinent literature illustrates with unusual clarity the interactions of social, political, and economic forces associated with this medical condition.

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