scholarly journals The Effects of Suprabullar Pneumatization on the Orientation of Its Surrounding Anatomical Structures Relevant to the Frontal Drainage Pathway

Diagnostics ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 52
Author(s):  
Nikma Fadlati Umar ◽  
Mohd Ezane Aziz ◽  
Norhafiza Mat Lazim ◽  
Baharudin Abdullah
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Chart Review ◽  
Retrospective Chart Review ◽  
Ethmoid Sinus ◽  
Anatomical Structures ◽  
Frontal Recess ◽  
Weak Association ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery

Objective: The aim of this study was to evaluate the effects of suprabullar pneumatization on the orientation of the frontal sinus outflow structures and its association with the volume of anterior ethmoid sinus. Methods: A retrospective chart review of computed tomography of paranasal sinuses (CTPNS) images was conducted. A total of 370 sides of the CTPNS of 185 patients were analyzed. Results: The course of anterior ethmoidal artery (AEA) along the skull base (p = 0.04) and position of AEA at the second lamella (p = 0.04) was significantly associated with the type of suprabullar pneumatization. The AEA is expected to be lower at the skull base and at a longer distance from the second lamella with the increase in grading of the suprabullar pneumatization. The distance of AEA to the second lamella (p < 0.001) and third lamella (p = 0.04) was significantly different depending on the type of suprabullar pneumatization, which indicates AEA is expected to be at a longer distance from the second lamella and third lamella in higher grade suprabullar pneumatization. The type of suprabullar pneumatization has a significant but weak association with the anterior ethmoid sinus volume (p = 0.04). Conclusions: There is a significant effect of the type of suprabullar pneumatization on the orientation of the surrounding anatomical structures at the frontal recess. The type of suprabullar pneumatization is influenced by the anterior ethmoid sinus volume, which suggests it has a possible role in the frontal drainage pathway.

scholarly journals Study of variants of anterior ethmoidal artery on computed tomography of paranasal sinuses

2018 ◽  
Vol 5 (1) ◽  
pp. 19
Author(s):  
S. B. Amarnath ◽  
P. Suresh Kumar
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Paranasal Sinuses ◽  
Congenital Anomalies ◽  
Anatomical Landmark ◽  
Frontal Recess ◽  
Severe Epistaxis ◽  
History Of ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery

<p class="abstract"><strong>Background:</strong> The anterior ethmoidal artery (AEA) is an anatomical landmark, its position is important for recognizing structures of difficult access (frontal sinus) and to define skull base in surgery.Additionally, visualizing this artery makes it possible to identify and treat causes of severe epistaxis. The aims and objectives of the study were to determine the reliability of identification of the AEA on the coronal CT scan, to study the variability in the pneumatisation of the suprabullar recess and the course of the AEA and to determine whether a correlation exists between the pneumatisation of the suprabullar recess and the distance of the AEA from the base skull.</p><p class="abstract"><strong>Methods:</strong> This study conducted among 200 Patients attending to ENT OPD, Yashoda hospital, Secunderabad with history of headache, nose block who underwent CT-PNS. Patients with age above 18 years without any congenital anomalies of face, without opacification in frontal recess or anterior ethmoidal cells, without nasal surgeries or trauma were included in the present study. All the 200 CT-PNS were studied in detail by using PACS and DICOM software.  </p><p class="abstract"><strong>Results:</strong> In this study AEA was present in 100% of cases on both sides. In this study AEA was seen in skull base in 50.75% of cases, among this 51% was on right side, remaining was on left side.</p><p class="abstract"><strong>Conclusions:</strong> CT-PNS coronal sections are helpful in assessment of AEA position pre-operatively. AEF and AES act as important landmarks for the identification of AEA in CT-PNS.</p>

Anterior Ethmoidal Artery: A Computed Tomography Analysis and New Classifications

2020 ◽  
Author(s):  
Mohammad Waheed El-Anwar ◽  
Alaa Omar Khazbak ◽  
Diaa Bakry Eldib ◽  
Hesham Youssef Algazzar
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Frontal Sinus ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery ◽  
The Mean ◽  
Type 3 ◽  
Sinus Ostium

Abstract Objective to determine the anterior ethmoidal artery (AEA) anatomy and variations by computed tomography (CT) in adult and their relations to and presents new AEA classifications. Methods One hundred and fifty paranasal CT scans (300 sides) were included. Axial images were acquired with multiplanar reformates to obtain delicate details in coronal and sagittal planes. Results One hundred and forty-four AEAs canal (48%), 293 AEAs foramen (97.7%), and 229 AEAs sulcus could be detected (76.3%). The mean AEA intranasal length was 6.7 ± 1.27 mm (range: 4.24–10.6 mm). The mean angle between AEA and lamina papyracea was 105.49 ± 9.28 degrees (range: 76.41–129.76 degrees). Of them, 95.8% AEAs had an angle with lamina >90 degrees, while 4.2% had angle <90 degrees. The mean angle between AEA and lateral lamella of cribriform plate was 103.95 ± 13.08 degrees (range: 65.57–141.36 degrees). Of them, 87.5% AEAs had an angle >90 degrees and 12.5% had an angle <90 degrees. The mean distance between AEA and skull base was 1.37 ± 1.98 mm (range: 0–8.35 mm). The AEA types in relation to skull base was type 1 (0–2 mm from skull base; 64.6%), type 2 (2–4 mm; 22.2%), type 3 (4–6 mm; 11.1%), and type 4 (>6 mm; 2.1%). The mean distance between the AEA and frontal sinus ostium was 9.17 ± 4.72 mm (range: 0–25.36 mm). AEA classification according to distance from AEA to frontal sinus ostium was 17.4% type 1 (<5 mm), 41.7% type 2 (5–10 mm), 31.9% type 3 (10–15 mm), and 9% type 4 (>15 mm). Conclusion Provided AEA details improve surgeons' awareness of AEA variations in the endoscopic field and can help residents in training.

scholarly journals Variability of the Anterior Ethmoid Artery in Endoscopic Sinus Surgery

2020 ◽  
pp. 014556132095048
Author(s):  
Mohamed A. Taha ◽  
Christian A. Hall ◽  
Harry E. Zylicz ◽  
Margaret B. Westbrook ◽  
William T. Barham ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Statistical Significance ◽  
Sinus Surgery ◽  
Preoperative Imaging ◽  
Computed Tomography Scans ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery ◽  
The Right ◽  
Anterior Ethmoid Artery

Introduction: The anterior ethmoidal artery (AEA) demonstrates anatomic variability relative to its descent from the anterior skull base. Our study’s objective was to assess for correlation of AEA descent and laterality, in addition to correlation of AEA descent and the presence of supraorbital ethmoid cells (SOEC) and concha bullosae (CB). Method: A retrospective study was performed at a tertiary rhinology center from January 2019 to January 2020. Noncontrast maxillofacial computed tomography scans were examined independently by 2 fellowship trained rhinologists. The vertical distance from both left and right AEAs to the ipsilateral skull base were compared and correlated with the presence of ipsilateral SOEC and CB. Results: Computed tomography scans from 50 subjects were included. Mean age was 50.68 years (40% females). The distance of AEA to the skull base was greater on the left when compared to the right (62% vs 48%) ( P < .05). The left AEA had an average descent of 2.84 mm versus 1.78 mm on the right ( P < .05). An SOEC was present in 56% of cases. Thirty-eight percent of subjects had both SOEC and AEA descent on the right, while 52% of subjects had both on the left. This reached a statistical significance on both sides ( P < .05). Concha bullosa was present in 35% of cases, with both AEA descent and CB present in 16% on the right, and 32% on the left. Conclusion: The AEA displays variability in vertical descent from the skull base, with greater variability on the left. These findings implore vigilance with evaluation of preoperative imaging and during sinus surgery, especially in the presence of SOEC and CB.

The Roof of the Anterior Ethmoid: A Place of Least Resistance in the Skull Base

1989 ◽  
Vol 3 (4) ◽  
pp. 191-199 ◽  
Author(s):  
Josef Kainz ◽  
Heinz Stammberger
Keyword(s):  
Skull Base ◽  
Preoperative Planning ◽  
Frontal Plane ◽  
Ethmoid Sinus ◽  
Ct Scans ◽  
Critical Area ◽  
Serial Sections ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery ◽  
Ethmoidal Arteries

Because of its special anatomic features the roof of the anterior ethmoid is a preferred area for frontobasal fractures as well as an area of hazard during ethmoid surgery. As clinical experience proves, the most critical area for lesions to occur is in the vicinity of the anterior ethmoidal artery, especially where it leaves the dome of the ethmoid medially to reach the ethmoidal sulcus in the olfactory fossa. Complete ethmoidal specimens were investigated by means of histologic serial sections in the frontal plane. Forty anterior ethmoidal arteries were anatomically prepared. Special features of their topography including connection with the dura, fixation of the dura to the bone of the skull base, and the variations of the thickness of the surrounding bony wall were studied with regard to their surgical relevance. Of utmost importance is the fact that the bone in the vicinity of the ethmoidal sulcus is up to 10 times thinner than the neighboring roof of the ethmoid sinus. Coronal CT scans demonstrating this most critical point with all its many possible variations are found to be invaluable for the preoperative planning of endoscopic or other ethmoid surgery.

Radiological anatomy of the anterior ethmoidal artery for functional endoscopic sinus surgery

2007 ◽  
Vol 122 (3) ◽  
pp. 264-267 ◽  
Author(s):  
S E McDonald ◽  
P J Robinson ◽  
D A Nunez
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Sinus Surgery ◽  
Radiological Anatomy ◽  
Base Level ◽  
Computed Tomography Scans ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery ◽  
Ethmoidal Foramen ◽  
Anterior Ethmoidal Foramen

AbstractAim:This study investigated the extent to which the anterior ethmoidal artery and anterior ethmoidal foramen could be reliably identified on routine coronal sinus computed tomography scans. Where they could be identified, the relationship of these structures with the vertical height of the skull base, and their distance from an anterior landmark, were measured.Methods:Fifty consecutive coronal sinus computed tomography scans were viewed independently by two observers. Scans were reviewed when the observers' opinions differed.Results:Inter-observer concordance was high. The anterior ethmoidal foramen was visualised in 95 per cent of cases bilaterally and in the remaining 5 per cent unilaterally. The anterior ethmoidal artery was visualised in 33 per cent of scans. The anterior ethmoidal foramen was at skull base level in 72 per cent of sides studied, and below it in the remainder. The distance from the lacrimal crest to the anterior ethmoidal foramen was 22.4 mm (mean; standard deviation 3.7).Conclusion:The anterior ethmoidal foramen is a reliable landmark on coronal computed tomography scans of the paranasal sinuses. From this, the position of the anterior ethmoidal artery can be inferred.

An artificial intelligence algorithm that differentiates anterior ethmoidal artery location on sinus computed tomography scans

2019 ◽  
Vol 134 (1) ◽  
pp. 52-55 ◽  
Author(s):  
J Huang ◽  
A-R Habib ◽  
D Mendis ◽  
J Chong ◽  
M Smith ◽  
...  
Keyword(s):  
Neural Network ◽  
Artificial Intelligence ◽  
Computed Tomography ◽  
Neural Networks ◽  
Convolutional Neural Network ◽  
Convolutional Neural Networks ◽  
Sinus Surgery ◽  
Computed Tomography Scans ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery

AbstractObjectiveDeep learning using convolutional neural networks represents a form of artificial intelligence where computers recognise patterns and make predictions based upon provided datasets. This study aimed to determine if a convolutional neural network could be trained to differentiate the location of the anterior ethmoidal artery as either adhered to the skull base or within a bone ‘mesentery’ on sinus computed tomography scans.MethodsCoronal sinus computed tomography scans were reviewed by two otolaryngology residents for anterior ethmoidal artery location and used as data for the Google Inception-V3 convolutional neural network base. The classification layer of Inception-V3 was retrained in Python (programming language software) using a transfer learning method to interpret the computed tomography images.ResultsA total of 675 images from 388 patients were used to train the convolutional neural network. A further 197 unique images were used to test the algorithm; this yielded a total accuracy of 82.7 per cent (95 per cent confidence interval = 77.7–87.8), kappa statistic of 0.62 and area under the curve of 0.86.ConclusionConvolutional neural networks demonstrate promise in identifying clinically important structures in functional endoscopic sinus surgery, such as anterior ethmoidal artery location on pre-operative sinus computed tomography.

scholarly journals Anatomy of the posterior and middle ethmoidal arteries via computed tomography

2018 ◽  
Vol 6 ◽  
pp. 205031211877247 ◽  
Author(s):  
Hiroki Yamamoto ◽  
Kazuhiro Nomura ◽  
Hiroshi Hidaka ◽  
Yukio Katori ◽  
Naohiro Yoshida
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Cell Walls ◽  
Older Age ◽  
Optic Canal ◽  
First Wall ◽  
Computed Tomography Images ◽  
Ethmoidal Artery ◽  
Ethmoidal Arteries ◽  
Age And Sex

Objective: The aim of this study is to investigate the anatomy of the posterior and middle ethmoidal arteries from the viewpoint of an endoscopic sinus surgeon. Methods: Based on 100 computed tomography images, the anatomical position of the posterior ethmoidal artery in relation to the posterior ethmoid cells was classified into five types. The presence of the posterior and middle ethmoidal arteries, their distance from the skull base, and their length exposed in the ethmoid cells were measured. The association of patients’ age and sex, presence of the middle ethmoidal artery, and anatomical type of the posterior ethmoidal artery with the posterior ethmoidal artery distance from the ethmoid roof was analyzed. Results: The posterior ethmoidal artery’s position, relative to the ethmoid cell walls, was most often near the first wall, anterior to the optic canal (92.5%). The posterior ethmoidal artery’s distance from the skull base ranged from 0 to 6.4 mm (mean: 1.2 mm). Older age, longer length of the posterior ethmoidal artery exposed in the ethmoid cells, and absence of the middle ethmoidal artery were positively associated with a longer posterior ethmoidal artery distance from the skull base. Conclusion: Attention should be paid to the posterior and middle ethmoidal arteries.

scholarly journals Computed Tomography Measurement of Hepatic Steatosis: Prevalence of Hepatic Steatosis in a Canadian Population

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Malcolm M. Wells ◽  
Zhe Li ◽  
Bryan Addeman ◽  
Charles A. McKenzie ◽  
Amol Mujoomdar ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Adipose Tissue ◽  
Liver Disease ◽  
Hepatic Steatosis ◽  
Subcutaneous Adipose Tissue ◽  
Chart Review ◽  
Retrospective Chart Review ◽  
Canadian Population ◽  
Adipose Tissue Volume ◽  
Subcutaneous Adipose

Background/Aims. Nonalcoholic fatty liver disease (NAFLD) is a chronic liver disease that can progress to cirrhosis and hepatocellular carcinoma. This retrospective chart review investigated the incidence of hepatic steatosis in London, Ontario, Canada.Methods. A retrospective chart review was performed on emergency room (ER) patients undergoing nonscheduled computed tomography (CT) imaging over a six-month period in London, Ontario. CT images and reports were examined to determine presence of steatosis. Analyses of the electronic chart for a period of six months following the CT and communication with the patients’ family doctors were used to determine if there was follow-up. Waist circumference, subcutaneous fat depth, and abdominal fat volumes were calculated.Results. 48/450 patients meeting inclusion criteria were identified by radiology as having steatosis, with 34/40 (85%) family physicians unaware of the finding. 24.7% (100/405) of patients met standard CT criteria for steatosis, 40 of which were reported by the radiologist. Waist circumference, subcutaneous adipose tissue depth, subcutaneous adipose tissue volume, and visceral adipose tissue volume were significantly associated with steatosis.Conclusions. The hepatic steatosis prevalence we report is the first reported in a Canadian population. Early identification of steatosis will become more important as new pharmacologic therapies arise.

Computed tomography imaging of the anterior ethmoidal artery: anatomic correlation [in French]

2008 ◽  
Vol 32 (5) ◽  
pp. 415
Author(s):  
S. Riehm ◽  
L. Penisson ◽  
A. Charpiot ◽  
P. Schultz ◽  
F. Veillon ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Computed Tomography Imaging ◽  
Tomography Imaging ◽  
Ethmoidal Artery ◽  
Anterior Ethmoidal Artery
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