The Evaluation of Morphometry of Nasal Bone and Pyriform Aperture Using Multidetector Computed Tomography

Background & Objectives: The maxillofacial region, a complex anatomical structure, can be evaluated by conventional (plain) films, Tomography, Multidetector Computed Tomography, Three-Dimensional Computed Tomography, Orthopantomogram and Magnetic Resonance Imaging. The study was conducted with objective of describing various forms of maxillofacial injuries, imaging features of different types of maxillofacial fractures and the advantage of using Three- Dimensional Computed Tomography reconstructed image. Materials & Methods: A hospital based cross-sectional study was conducted among 50 patients during April 2014 to September 2016 using Toshiba Aquilion Prime 160 slice Multi Detector Computed Tomography scanner.Results: The maxillofacial fractures were significantly higher in male population (88%) than female population (12 %). Road traffic accidents were the most common cause of injury others being physical assault and fall from height. It was most common in 31-40 years (26%) and 21-30 (24%) years age group. Maxillary sinus was the commonest fracture (36%) followed by nasal bone and zygomatic bone (30%), mandible and orbital bones (28%). Soft tissue swelling was the commonest associated finding. Three dimensional images (3 D) compared to the axial scans missed some fractures. However, the extension of the complex fracture lines and degree of displacement were more accurately assessed. Complex fractures found were Le fort (6%) and naso-orbito-ethmoid (4%) fractures.Conclusion: The proper evaluation of complex anatomy of the facial bones requires Multidetector Computed Tomography which offers excellent spatial resolution enabling multiplanar reformations and three dimensional reconstructions for enhanced diagnostic accuracy and surgical planning.

Download Full-text

Computed Tomography Evaluation of Nasal Dimensions among Different Singaporean Ethnicities

Facial Plastic Surgery ◽

10.1055/s-0040-1715615 ◽

2020 ◽

Vol 36 (05) ◽

pp. 499-504

Author(s):

Charmain Liling Zhao ◽

Suzanne Teo ◽

Lisa Lim ◽

Sandeep Uppal

Keyword(s):

Computed Tomography ◽

Degrees Of Freedom ◽

Nasal Bone ◽

Ct Images ◽

Lateral Osteotomy ◽

Significant Difference ◽

Aperture Width ◽

Nasal Pyramid ◽

High Level ◽

Pyriform Aperture

AbstractOsteotomies in rhinoplasty are performed to correct deformities in nasal contour. The size of osteotome used is dictated by the thickness of the bony nasal pyramid along the osteotomy route. The aim of this study is to determine whether nasal bony dimensions differ between different ethnic groups in Singapore. Randomly selected patients' computed tomography (CT) scans of the face performed between the years 2010 to 2013 in our institution (Khoo Teck Puat Hospital) were evaluated. The setting was a tertiary government hospital. CT images of 309 patients (233 Chinese [147 males, 86 females], 32 Malays [16 males, 16 females], and 44 Indians [33 males, 11 females]) were evaluated. Anthropomorphic measurements of the nasal bone along the track of the lateral, medial, and intermediate osteotomies, as well as the nasal bone length and pyriform aperture width were measured on the CT images by two independent observers. Statistical analysis was performed using Student's t-test and two-way analysis of variance (ANOVA) test. There was no significant difference between the nasal pyramid bone thickness between different ethnicities along the osteotomy tracks (p > 0.05; degrees of freedom [df] = 2). However, there was a significant difference between males and females of the same ethnicity at the low level of the lateral osteotomy (p = 0.003) and the midlevel (p = 0.002) and high-level (p = 0.004) of the intermediate osteotomy. There was a statistically significant difference in nasal pyramid length (p < 0.05, df = 2) and pyriform aperture width (p < 0.05, df = 2) among the races and between the genders (p < 0.05). The mean difference in nasal pyramid length of 2.54 mm and pyriform aperture width of 1.89 mm was particularly significant between the Chinese and the Indians. Gender and ethnic differences in nasal bony dimensions should be considered in surgical planning for rhinoplasty.

Download Full-text

941 Integration of electroanatomic mapping and multidetector computed tomography as a guide for atrial fibrillation catheter ablation

EP Europace ◽

10.1016/s1099-5129(05)80663-4 ◽

2005 ◽

Vol 7 ◽

pp. 226-226

Keyword(s):

Computed Tomography ◽

Atrial Fibrillation ◽

Catheter Ablation ◽

Multidetector Computed Tomography ◽

Electroanatomic Mapping

Download Full-text

Assessment of vascular and biliary complications after liver transplantation: imaging with multidetector computed tomography angiography (MDCT-A), doppler us and contrast-enhanced us (CEUS)

Ultraschall in der Medizin - European Journal of Ultrasound ◽

10.1055/s-2007-988872 ◽

2007 ◽

Vol 28 (S 1) ◽

Author(s):

S Savelli ◽

S Pascoli ◽

M Atzori ◽

P Ialongo ◽

G Regine ◽

...

Keyword(s):

Computed Tomography ◽

Liver Transplantation ◽

Multidetector Computed Tomography ◽

Computed Tomography Angiography ◽

Biliary Complications ◽

Doppler Us ◽

Contrast Enhanced ◽

Multidetector Computed Tomography Angiography

Download Full-text

Analysis of Hepatic Capsular Enhancement Mimicking the Fitz-Hugh-Curtis Syndrome on a Multidetector Computed Tomography

Journal of the Korean Radiological Society ◽

10.3348/jkrs.2008.58.3.277 ◽

2008 ◽

Vol 58 (3) ◽

pp. 277

Author(s):

Ji Sang Park ◽

Seong Jin Park ◽

Hae Kyung Lee ◽

Boem Ha Yi ◽

Hyun Sook Hong ◽

...

Keyword(s):

Computed Tomography ◽

Multidetector Computed Tomography ◽

Fitz Hugh Curtis Syndrome

Download Full-text

Noninvasive Evaluation of Coronary Artery Bypass Grafts with 16-Slice Multidetector Computed Tomography

The Heart Surgery Forum ◽

10.1532/hsf98.20111075 ◽

2012 ◽

Vol 15 (1) ◽

pp. 12 ◽

Cited By ~ 1

Author(s):

Levent Sahiner ◽

Ali Oto ◽

Kudret Aytemir ◽

Tuncay Hazirolan ◽

Musturay Karcaaltincaba ◽

...

Keyword(s):

Computed Tomography ◽

Coronary Artery ◽

Diagnostic Accuracy ◽

Multidetector Computed Tomography ◽

Coronary Artery Bypass ◽

Predictive Value ◽

Artery Bypass ◽

Time Interval ◽

Mdct Angiography ◽

Sensitivity Specificity

Background: The aim of this study was to investigate the diagnostic accuracy of 16-slice multislice, multidetector computed tomography (MDCT) angiography for the evaluation of grafts in patients with coronary artery bypass grafting (CABG).Methods: Fifty-eight consecutive patients with CABG who underwent both MDCT and conventional invasive coronary angiography were included. The median time interval between the 2 procedures was 10 days (range, 1-32 days). The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of MDCT for the detection of occluded grafts were calculated. The accuracy of MDCT angiography for detecting significant stenoses in patent grafts and the evaluability of proximal and distal anastomoses were also investigated.Results: Optimal diagnostic images could not be obtained for only 3 (2%) of 153 grafts. Evaluation of the remaining 150 grafts revealed values for sensitivity, specificity, PPV, NPV, and diagnostic accuracy of the MDCT angiography procedure for the diagnosis of occluded grafts of 87%, 97%, 94%, 93%, and 92%, respectively. All of the proximal anastomoses were optimally visualized. In 4 (8%) of 50 patent arterial grafts, however, the distal anastomotic region could not be evaluated because of motion and surgical-clip artifacts. The accuracy of MDCT angiography for the detection of significant stenotic lesions was relatively low (the sensitivity, specificity, PPV, and NPV were 67%, 98%, 50%, and 99%, respectively). The number of significant lesions was insufficient to reach a reliable conclusion, however.Conclusion: Our study showed that MDCT angiography with 16-slice systems has acceptable diagnostic performance for the evaluation of coronary artery bypass graft patency.

Download Full-text