Computed Tomographic Discography in the Evaluation of Extreme Lateral Disc Herniation

Neurosurgery ◽  
1984 ◽  
Vol 14 (3) ◽  
pp. 350-352 ◽  
Author(s):  
J. C. Angtuaco Edgardo ◽  
C. Holder John ◽  
C. Boop Warren ◽  
F. Binet Eugene
Keyword(s):  
Lumbar Spine ◽  
High Resolution ◽  
Contrast Enhancement ◽  
Thin Section ◽  
Preoperative Evaluation ◽  
Intervertebral Discs ◽  
Ct Scans ◽  
Computed Tomographic ◽  
Disc Herniations ◽  
Lateral Disc Herniation

Abstract Thin section, high resolution computed tomographic (CT) scans of the lumbar spine produce images that can show herniated intervertebral discs without intravenous or intrathecal contrast enhancement. With this technique, the diagnosis of posterolateral and midline herniation has been greatly facilitated. This communication reports the use of CT discography in the preoperative evaluation of two patients who were shown at discography and proven at operation to have extreme lateral disc herniations.

Percutaneous Discectomy: An Anatomical Study

Neurosurgery ◽  
1985 ◽  
Vol 16 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Steven L. Kanter ◽  
William A. Friedman
Keyword(s):  
Computed Tomography ◽  
Lumbar Spine ◽  
Vascular Injury ◽  
Anatomical Study ◽  
Intervertebral Discs ◽  
Viable Alternative ◽  
Percutaneous Discectomy ◽  
Computed Tomographic ◽  
Anatomical Analysis ◽  
Computed Tomographic Scan

Abstract Percutaneous discectomy is a viable alternative in the treatment of herniated intervertebral discs of the lumbar spine. Anatomical analysis of the retroperitoneal surgical path utilizing computed tomography suggests that the risk of vascular injury is negligible at the L-4, L-5 level, but substantial at the L-5, S-1 level. In addition, one-third of patients otherwise suitable for percutaneous discectomy have segments of bowel obstructing the surgical path. Obtaining an abdominal computed tomographic scan with the patient in the surgical position seems to be a valuable screening technique in the evaluation of candidates for this procedure.

scholarly journals Contribution of CAD to the Sensitivity for Detecting Lung Metastases on Thin-Section CT – A Prospective Study with Surgical and Histopathological Correlation

2019 ◽  
Vol 192 (01) ◽  
pp. 65-73 ◽  
Author(s):  
Christian Meybaum ◽  
Mareike Graff ◽  
Eva Maria Fallenberg ◽  
Gunda Leschber ◽  
Dag Wormanns
Keyword(s):  
Thin Section ◽  
Lung Metastases ◽  
Ct Scans ◽  
Pulmonary Metastasectomy ◽  
Computed Tomographic ◽  
Cad System ◽  
Histopathological Correlation ◽  
Experienced Radiologist ◽  
Key Points ◽  
A Prospective Study

Purpose To assess the sensitivity of radiologists and a CAD system for the detection of lung metastases on thin-section computed tomographic (CT) scans prior to pulmonary metastasectomy. Materials and Methods All patients scheduled for resection of lung metastases were eligible for this prospective single-center trial. 95 patients with 115 surgical procedures (pulmonary metastasectomy using thoracotomy) were included. An experienced radiologist examined the CT scans for pulmonary metastases and documented his findings. A commercial CAD system was used as a second reader; additional CAD findings were recorded. A comparison of the sensitivity of the radiologist alone and with CAD was performed. Intraoperatively surgeons tried to identify the documented lesions and resected them as well as additionally palpable lesions. The standard of reference consisted of surgery and histopathology. Follow-up information for radiologically detected lesions missed during surgery was sought. Results 693 lesions (262 metastases) were detected radiologically or surgically, 646 of them were resected. The sensitivity of radiologists without CAD was 67.5 % for all lesions (87.4 % for metastases). CAD highly significantly (p < 0.001) increased the sensitivity to 77.9 % (92.7 %). During surgery, 143 additional lesions (19 metastases) were detected. 49 radiologically detected lesions were not palpable during surgery: 4 metastases, 5 benign lesions, and 40 lesions of an unknown nature. Conclusion CAD provides significant additional sensitivity for detecting lung metastases using MDCT compared to the performance of a radiologist alone. CT reveals a relevant number of non-palpable pulmonary lesions. Key Points:  Citation Format

Otosclerosis: Incidence of Positive Findings on High-Resolution Computed Tomography and Their Correlation to Audiological Test Data

2005 ◽  
Vol 114 (9) ◽  
pp. 709-716 ◽  
Author(s):  
Ilka C. Naumann ◽  
Beat Porcellini ◽  
Ugo Fisch
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Sodium Fluoride ◽  
Bone Conduction ◽  
Ct Scanning ◽  
Ct Scans ◽  
High Resolution Computed Tomography ◽  
Computed Tomographic ◽  
Mixed Hearing Loss ◽  
Temporal Bone Ct

Objectives: Computed tomographic (CT) scanning with slices of 1 mm or more has not been sufficient to demonstrate otosclerotic foci in most cases to date. Methods: We investigated the validity of CT scans with a 0.5-mm cubical scan technique, with and without planar reconstruction, and correlated these findings with audiological data. Forty-four temporal bone CT scans from 30 patients with conductive or mixed hearing loss were evaluated. Results: Otosclerotic foci were visualized in 74% of the cases. With reconstruction at the workstation, the sensitivity increased to 85%. Whereas in fenestral otosclerosis a correlation was found between the size of the focus and the air-bone gap, no correlation was seen between the size of the focus and bone conduction thresholds with cochlear involvement. Otosclerotic foci in patients treated with sodium fluoride were smaller than those in patients without treatment. This finding may indicate a beneficial effect of sodium fluoride on otosclerotic growth. Conclusions: High-resolution CT scans are a valid tool that can be used to confirm, localize, and determine the size of clinically suspected otosclerotic foci.

scholarly journals Ossification and Fusion of the Vertebral Ring Apophysis as an Important Part of Spinal Maturation

2021 ◽  
Vol 10 (15) ◽  
pp. 3217
Author(s):  
Lorenzo Costa ◽  
Steven de Reuver ◽  
Luc Kan ◽  
Peter Seevinck ◽  
Moyo C. Kruyt ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lumbar Spine ◽  
High Resolution ◽  
Vertebral Body ◽  
Rapid Growth ◽  
Normal Growth ◽  
Ct Scans ◽  
Growth Spurt ◽  
Strongly Correlated ◽  
Thoracic And Lumbar Spine

In scoliosis, most of the deformity is in the disc and occurs during the period of rapid growth. The ring apophyses form the insertion of the disc into the vertebral body, they then ossify and fuse to the vertebrae during that same crucial period. Although this must have important implications for the mechanical properties of the spine, relatively little is known of how this process takes place. This study describes the maturation pattern of the ring apophyses in the thoracic and lumbar spine during normal growth. High-resolution CT scans of the spine for indications not related to this study were included. Ossification and fusion of each ring apophysis from T1 to the sacrum was classified on midsagittal and midcoronal images (4 points per ring) by two observers. The ring apophysis maturation (RAM) was compared between different ages, sexes, and spinal levels. The RAM strongly correlated with age (R = 0.892, p < 0.001). Maturation differed in different regions of the spine and between sexes. High thoracic and low lumbar levels fused earlier in both groups, but, around the peak of the growth spurt, in girls the mid-thoracic levels were less mature than in boys, which may have implications for the development of scoliosis.

Role of High-Resolution Thin Section Computed Tomographic Scanning

2003 ◽  
pp. 167-236
Author(s):  
David Zisman ◽  
Ella kazerooni ◽  
Kevin Flaherty ◽  
Fernando Martinez
Keyword(s):  
High Resolution ◽  
Thin Section ◽  
Computed Tomographic

Predicting Nasal Soft Tissue Envelope Thickness for Rhinoplasty: A Model Based on Visual Examination of the Nose

2020 ◽  
Vol 130 (1) ◽  
pp. 60-66
Author(s):  
Jacob K. Dey ◽  
Chelsey A. Recker ◽  
Michael D. Olson ◽  
Andrew J. Bowen ◽  
Grant S. Hamilton
Keyword(s):  
High Resolution ◽  
Soft Tissue ◽  
Preoperative Evaluation ◽  
Skin Type ◽  
Ct Scans ◽  
Facial Features ◽  
Tertiary Referral Center ◽  
Soft Tissue Envelope ◽  
Nasal Tip ◽  
Fitzpatrick Skin Type

Importance: Predicting nasal soft tissue envelope (STE) thickness is an important component of the preoperative evaluation for rhinoplasty that presently lacks validated tools. Objective: Assess for patient facial features and factors that can help predict nasal STE thickness. Design, Setting, and Participants: Retrospective review and prospective assessment conducted at an academic tertiary referral center. This study included 190 adult patients and four expert raters. The patients had high-resolution maxillofacial CT scans and standardized facial photographs on file and did not have a history of nasal fracture, septal perforation, rhinoplasty, or other surgery or medical conditions altering nasal form. Main Outcomes and Measures: Assess each face for features that could help predict nasal STE thickness: sebaceous quality of skin, visibility of nasal tip cartilages, presence of freckles, presence of telangiectasias, Fitzpatrick skin type, patient age, sex, and body mass index (BMI). Measure actual nasal STE thickness using high-resolution CT scans. Analyze which facial features and patient factors help predict nasal STE thickness. Results: Pearson correlations were calculated between actual nasal STE thickness and patient facial features and factors. These showed that more sebaceous skin, telangiectasias, higher Fitzpatrick skin type, male sex, and higher BMI were associated with a thicker nasal STE. Increased visibility of nasal tip cartilages, freckles, lower Fitzpatrick skin type, female sex, and lower BMI were associated with a thinner nasal STE. Conclusions and Relevance: There are patient facial features and factors that can help surgeons predict nasal STE thickness before rhinoplasty. An accurate prediction of nasal STE thickness can improve preoperative planning for rhinoplasty, allowing implementation of pre-, intra-, and post-operative treatments to optimize the nasal STE, which may ultimately improve patient outcomes and satisfaction.

Comparative Study Using Computed Tomographic Thin-Section Zoom Reconstructions and Anatomic Macrosections of the Temporal Bone

1981 ◽  
Vol 90 (6) ◽  
pp. 643-649 ◽  
Author(s):  
Charles W. Beatty ◽  
Lowell D. Harris ◽  
Ku Won Suh ◽  
David F. Reese
Keyword(s):  
High Resolution ◽  
Image Reconstruction ◽  
Temporal Bone ◽  
Thin Section ◽  
Internal Auditory Canal ◽  
Semicircular Canals ◽  
Resolution Image ◽  
Computed Tomographic ◽  
High Resolution Image ◽  
Vestibular Aqueduct

Thin-section (1.5 mm) high-spatial-resolution computed tomography (CT) in combination with computerized high-resolution image reconstruction is an effective, noninvasive means of studying patients with a variety of temporal bone abnormalities. To determine what degree of definition and anatomic accuracy could currently be obtained by using these techniques, we performed thin-section CT and high-resolution image reconstruction with use of two fresh-frozen cadaver head specimens. We then compared these images with the actual anatomic macrosections subsequently obtained from the specimens. We concluded that high-resolution CT scans of the temporal bone can produce accurate, highly detailed, diagnostic images of the internal auditory canal, vestibule, cochlea, vestibular aqueduct, semicircular canals, ossicles, and middle ear space.

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