Read by QxMD icon Read

Anatomy variation

Seval Bayrak, Emine Şebnem Kurşun-Çakmak, Cemal Atakan, Kaan Orhan
OBJECTIVES: The goal of this retrospective study is to evaluate the radiologic anatomy of sphenoidal emissary foramen (SEF) by using cone-beam computed tomography (CBCT) scans. METHODS: Three hundred seventeen (189 female and 128 male) full-head CBCT images were evaluated in this study. Incidence, diameter, shape, confluence to foramen ovale, and distance to anatomic structures of SEF were noted. RESULTS: In the 317 analyzed images, the SEF was identified in 89 (28...
March 14, 2018: Journal of Craniofacial Surgery
Rajani Singh, Rajnish Arora, Raj Kumar
Chiari malformations (CMs) are variant structural setup of cerebellum and brain stem at the craniovertebral junction. Normally the cerebellum and parts of the brain stem lie above the foramen magnum. When the part of the cerebellum and/or brainstem protrudes into the upper spinal canal through foramen magnum, it is defined as CM. Chiari malformations may develop when part of the skull is smaller than normal or misshapen, due to which the cerebellum herniates into spinal canal through foramen magnum. This compresses the cerebellum and brainstem affecting functions controlled by these parts and blocks the flow of cerebrospinal fluid that surrounds and cushions the brain and spinal cord...
March 14, 2018: Journal of Craniofacial Surgery
Thomas Coquet, Michel Lefranc, Louis Chenin, Pascal Foulon, Éric Havet, Johann Peltier
In this anatomy report, we describe the first case of abducens nerve duplication limited to the sphenopetroclival venous gulf and the cavernous sinus. The objective point of division of the two duplicated roots was localized at the gulfar face of the dural porus, just distal to the unique cisternal trunk of the abducens nerve, as it pierced the petroclival dural mater. In the gulfar segment, both roots traveled through a variant of Dorello's canal called the "petrosphenoidal canal" and remained separated through the posterior half of the cavernous sinus...
March 15, 2018: Surgical and Radiologic Anatomy: SRA
Ruobing Huang, Ana Namburete, Alison Noble
We present a general framework for automatic segmentation of fetal brain structures in ultrasound images inspired by recent advances in machine learning. The approach is based on a region descriptor that characterizes the shape and local intensity context of different neurological structures without explicit models. To validate our framework, we present experiments to segment two fetal brain structures of clinical importance that have quite different ultrasonic appearances-the corpus callosum (CC) and the choroid plexus (CP)...
January 2018: Journal of Medical Imaging
Ricardo Araújo, Vincent Fernandez, Richard D Rabbitt, Eric G Ekdale, Miguel T Antunes, Rui Castanhinha, Jörg Fröbisch, Rui M S Martins
The semicircular canal (SC) system of the inner ear detects head angular accelerations and is essential for navigation and spatial awareness in vertebrates. Because the bony labyrinth encloses the membranous labyrinth SCs, it can be used as a proxy for animal behavior. The bony labyrinth of dicynodonts, a clade of herbivorous non-mammalian synapsids, has only been described in a handful of individuals and remains particularly obscure. Here we describe the bony labyrinth anatomy of three Endothiodon cf. bathystoma specimens from Mozambique based on digital reconstructions from propagation phase-contrast synchrotron micro-computed tomography...
2018: PloS One
Sergey Y Turin, Cathy J Tang, Arun K Gosain
The anatomy of the greater palatine foramen has variation with regard to location, but there have been no reports on the absence of a complete foramen. We present 2 cases of pediatric patients with cleft palates possessing a greater palatine "notch" as opposed to a bony foramen. Awareness of this anomaly is advantageous in preventing injury to the greater palatine vessels during palatoplasty.
January 1, 2018: Cleft Palate-craniofacial Journal
Steven R Dolly, Yang Lou, Mark A Anastasio, Hua Li
It is widely known that the optimization of imaging systems based on objective, task-based measures of image quality via computer-simulation requires the use of a stochastic object model (SOM). However, the development of computationally tractable SOMs that can accurately model the statistical variations in human anatomy within a specified ensemble of patients remains a challenging task. Previously reported numerical anatomic models lack the ability to accurately model inter-patient and inter-organ variations in human anatomy among a broad patient population, mainly because they are established on image data corresponding to a few of patients and individual anatomic organs...
March 14, 2018: Physics in Medicine and Biology
Konstantinos Natsis, Maria Piagkou, Nikolaos Lazaridis, Trifon Totlis, Nikolaos Anastasopoulos, Jannis Constantinidis
PURPOSE: The current study investigated the incidence, morphology and morphometry of the ossified ligaments expanding between petrous bone and posterior clinoid processes and in between the anterior, middle and posterior clinoid processes. Side symmetry, gender dimorphism and age influence were also studied. MATERIALS AND METHODS: A total of 123 adult Greek dry skulls were observed. RESULTS: A caroticoclinoid bar (CCB) was found in 60.2%. Partial CCBs appeared more commonly (36...
February 10, 2018: Journal of Cranio-maxillo-facial Surgery
Irene Polycarpou, Georgios Soultanidis, Charalampos Tsoumpas
The investigation of the performance of different positron emission tomography (PET) reconstruction and motion compensation methods requires accurate and realistic representation of the anatomy and motion trajectories as observed in real subjects during acquisitions. The generation of well-controlled clinical datasets is difficult due to the many different clinical protocols, scanner specifications, patient sizes, and physiological variations. Alternatively, computational phantoms can be used to generate large data sets for different disease states, providing a ground truth...
March 2018: IEEE Transactions on Medical Imaging
Hisanaga Horie, Koji Koinuma, Homare Ito, Ai Sadatomo, Daishi Naoi, Yoshihiko Kono, Yoshiyuki Inoue, Mitsuaki Morimoto, Makiko Tahara, Alan K Lefor, Naohiro Sata, Takahiro Sasaki, Hideharu Sugimoto
INTRODUCTION: Laparoscopic lateral pelvic lymph node dissection (LPLD) is technically challenging because of the complicated anatomy of the pelvic wall. To overcome this difficulty, we introduced preoperative 3-D simulation. The aim of the study is to investigate the usefulness of preoperative 3-D simulation for the safe conduct of laparoscopic LPLD for rectal cancer. METHODS: After undergoing colonoscopy, patients were brought to the radiology suite where multi-detector row CT was performed...
March 12, 2018: Asian Journal of Endoscopic Surgery
Mitchell A Rees, Nikhil B Amesur, Ruy J Cruz, Amir A Borhani, Kareem M Abu-Elmagd, Guilherme Costa, Anil K Dasyam
Intestinal transplantation has evolved from its experimental origins in the mid-20th century to its status today as an established treatment option for patients with end-stage intestinal failure who cannot be sustained with total parenteral nutrition. The most common source of intestinal failure in both adults and children is short-bowel syndrome, but a host of other disease processes can lead to this common end-point. The development of intestinal transplantation has presented multiple hurdles for the transplant community, including technical challenges, immunologic pitfalls, and infectious complications...
March 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Navid Pourtaheri, Bahman Guyuron
PURPOSE: To correlate the location and size of supraorbital notches (SON) and foramen (SOF) with migraine headache symptoms in a migraine patient population. METHODS: A retrospective review was performed on consecutive patients who were candidates for frontal migraine surgery with available preoperative computed tomography (CT) images of the face/perinasal sinuses. The supraorbital anatomy from CT images was analyzed and correlated with presenting migraine headache symptoms...
February 14, 2018: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
Nicholas Y Tan, Omar Z Yasin, Alan Sugrue, Abdallah El Sabbagh, Thomas A Foley, Samuel J Asirvatham
The left atrial appendage has been implicated as a major nidus for thrombus formation, particularly in atrial fibrillation. This discovery has prompted substantial interest in the development of left atrial appendage exclusion devices aimed at decreasing systemic thromboembolism risk. Its deceptively simple appearance belies the remarkable complexity that characterizes its anatomy and physiology. We highlight the key anatomic features and variations of the left atrial appendage as well as its relationships with surrounding structures...
April 2018: Interventional Cardiology Clinics
Myoung Soo Kim
OBJECTIVE: Sometimes a vertebral artery (VA) enters the spinal canal via the C1-2 intervertebral space, a variation regarded as a C2 segmental-type VA. This paper describes the anatomy of the C2 segmental-type VA and reviews its clinical importance. METHODS: Between March 2014 and November 2015, 3386 patients underwent computed tomographic angiography. I identified C2 segmental-type VAs, associated vascular variation, the origin of ipsilateral posterior inferior cerebellar arteries (PICAs), and the clinical symptoms associated with C2 segmental-type VAs...
March 2018: Journal of Korean Neurosurgical Society
Anubha Saha, Sanchita Roy
INTRODUCTION: Papillary muscle plays an important role in stabilizing the position of the tricuspid valve. Several pathologies can result in anatomical and functional abnormalities of the papillary muscles. The aim of the study is to deliberate the morphometry of papillary muscles in tricuspid valve and to analyze with the eminent research works previously done. MATERIALS AND METHODS: The study was carried out in 52 formalin-fixed adult apparently normal cadaveric hearts belonging to either sex obtained from the Department of Anatomy...
February 9, 2018: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
Long Wang, Li Cai, Shuaibin Lu, Hai Qian, Michael T Lawton, Xiang'en Shi
Internal maxillary artery (IMA) bypass has gain momentum in the last 5 years for the treatment of complex cerebrovascular disorders and skull base tumors. However, some issues regarding this treatment modality have been proposed. As one of the most experienced neurosurgical team to perform internal maxillary artery bypass in the world (>100 clinical cases), we reviewed literature in aspects of basic anatomy of maxillary artery with its variations to the lateral pterygoid muscle, initial anastomosis modalities and subsequent exposure techniques in cadaver studies, pre-operative arterial evaluation methods, optimal interposed graft selections and surgical outcome in the management of complex aneurysms, skull base tumors and steno-occlusive disorders...
March 7, 2018: World Neurosurgery
Hanifi Bayaroğulları, Gülen Burakgazi, Taşkın Duman
PURPOSE: We aimed to determine the anatomical variations more comprehensively particularly at the level of superior sagittal sinus (SSS), confluence of sinuses (CS), transverse sinuses (TS), straight sinuses (SS) and occipital sinuses (OS) with the help of the images obtained via MRI venography, and to contribute to the classification efforts. METHODS: In our retrospective study, we evaluated 211 patients who admitted to our hospital with various complaints and cerebral MRI venography has been performed...
March 7, 2018: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Baogang Qian, Robert F Rudy, Tianxi Cai, Rose Du
Many strains of mice are utilized in mouse models of cerebrovascular diseases. Variations in vascular anatomy between these strains has been documented and may influence the phenotype in stroke models. To address inter-strain variations in the circle of Willis anatomy, the diameters of internal carotid, posterior communicating, anterior cerebral, and middle cerebral arteries in 144 mice from 32 inbred strains were measured. Arterial diameters were analyzed as a function of animal weight, age, and strain. Variations in the structure of the circle of Willis across strains were observed and noted...
2018: Frontiers in Neuroanatomy
David F Pinal-Garcia, Carlos M Nuno-Guzman, Maria E Gonzalez-Gonzalez, Tomas R Ibarra-Hurtado
Background: The celiac artery, celiac axis or celiac trunk is the first major abdominal branch of the aorta. Anatomic variations and accessory vessels have been reported with variable percentages. The purpose of this study was to report the pattern of the celiac trunk and its anatomic variations in a sample of Mexican population. Methods: Celiac trunk dissection was performed in 140 fresh cadavers. Cadavers of Mexican subjects aged 18 years and older were included...
April 2018: Journal of Clinical Medicine Research
Min Wu, Xianming Fu, Ying Ji, Wanhai Ding, Dali Deng, Yehan Wang, Xiaofeng Jiang, Chaoshi Niu
BACKGROUND: Microvascular decompression (MVD) of the trigeminal nerve is the most effective treatment for trigeminal neuralgia (TN). However, when encountering with classical trigeminal neuralgia caused by venous compression, the procedure becomes much more difficult, and failure or recurrence due to incomplete decompression may become frequent. This study aimed to investigate the anatomical variation of the culprit veins, and discuss the surgical strategy for different types respectively...
March 3, 2018: World Neurosurgery
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"