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Showing 1 to 20 of 24 for “"Anatomical variations"”.
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Circulus arteriosus cerebri: Anatomical variations and their correlation to cerebral aneurysms
The anatomical structure of circulus arteriosus cerebri was first described by Thomas Willis in 1664. Many variations in the circulus arteriosus cerebri have since been reported. The extent to which anatomical variations within the circle influence aneurysm formation in a South African sample has …
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A cadaveric and magnetic resonance imaging study of the anatomical variations of levator scapulae
… pain and discomfort in patients. The muscle anatomically presents with an average of four muscle slips, originating from the transverse processes of the first four cervical vertebrae (C1-C4) and inserts onto the superomedial border of the scapula. The main function of the levator scapulae …
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Anatomical Variations and Degenerative Features of the Coracoacromial Ligament (CAL) in Shoulders with Rotator Cuff Tears
The purpose of this study is to evaluate anatomical variations of the coracoacromial ligament (CAL) in relation to the etiology of subacromial impingement syndrome and rotator cuff tears. A knowledge and understanding of these variations will help to determine how such variations may influence the …
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A dissection and angiographic study of anatomical variations in the anterior communicating artery complex in a South African sample
… of aneurysms and anterior cerebral circulation variations. Clear correlation between cerebral arterial circulation variations and aneurysm development has been reported. Cerebrovascular diseases play a significant role in the causes of morbidity in South Africa. South African data in this area …
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A Proof-of-Concept Application of Principal Component Analysis For Identification of Anatomical Variations in Pharyngeal Flap Patients Experiencing Persistent Velopharyngeal Insufficiency
… flaps is an insufficient method due to anatomical differences found in the patients receiving these surgeries. This study developed a proof-of-concept method for using principal component analysis to identify potential differences in anatomical shapes and compare them to clinical …
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Kepenų arterijų anatominės variacijos bei jų reikšmė radiologinėje diagnostikoje ir klinikinėje praktikoje /
SUMMARY Relevance: Variations in hepatic arterial anatomy are extremely common, with studies suggesting that more than half of the patients have one of the atypical variants. To visualize variations in arterial anatomy it is important to choose the most optimal diagnostic method that meets the …
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An investigation into variations in the venous drainage pattern in brains of adolescents and adults
… system is characterised by a higher incidence of anatomical variations than the arterial system. Limited information is available on anatomical variation of the complete cerebral venous system. It is important to have an understanding of the usual drainage pattern the cerebral venous system and …
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Robust Treatment Planning and Robustness Evaluation for Proton Therapy of Head and Neck Cancer
… treatment, patients are prone to present anatomical variations during the treatment course, which can be random deviations in patient positioning, as well as treatment-induced tumor shrinkage and patient weight variations. For IMPT plans using a PTV margin expansion, these anatomical …
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3D spherical harmonic invariant features for sensitive and robust quantitative shape and function analysis in brain MRI
… was developed to reduce the influence of anatomical variations on the functional features. Synthetic data tests demonstrate the improved sensitivity of this approach over the conventional normalization approach in the presence of intersubject variability. Furthermore, application to real …
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A CBCT study of canalis sinuosus and its accessory canals in patients attending a South African dental hospital
… Canalis sinuosus (CS) is a lesser-known anatomical structure residing in this region. CS is an intra-osseous canal housing the anterior superior alveolar nerve (ASAN) and artery (ASAA). The terminal portion of CS frequently gives rise to discrete intra-osseous canals, termed accessory …
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Cutaneous innervation of the hand
… of the hand, appreciation of the possible variations and presence of communicating branches will result in a better evaluation of signs and symptoms, establishing a proper therapeutic plan, avoiding iatrogenic injuries during surgical interventions, and properly diagnose postoperative …
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In-vitro experiments on neuronal cells and computer modeling over realistic head models in TMS
… each coil and position to explore the role of anatomical variations in TMS.</p>
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Managing radiotherapy treatment trade-offs using multi-criteria optimisation and data envelopment analysis
… multiple criteria, including one that represents anatomical variations between patients. An application to prostate cases demonstrates the capability of the method in identifying plans with further improvement potential. A multi-criteria based planning technique that considers treatment delivery …
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Seasonal and Anatomical Variation in Compact Bone Remodeling in the Adult Sheep
<p>ABSTRACT</p> <p>SEASONAL AND ANATOMICAL VARIATION IN COMPACT BONE REMODELING IN THE ADULT SHEEP</p> <p>Joseph Calcagno</p> <p>In order to determine whether ovine compact bone is suitable for study of osteoporosis, the remodeling parameters of the untreated animal must be fully characterized. …
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Probabilistic Analysis of the Material and Shape Properties for Human Liver
… population require incorporating inter-subject variations into numerical human models. The main objective of this study was to quantify the variations in shape and material properties of the human liver. Statistical shape analysis was applied to analyze the geometrical variation using a surface …
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Risk and Risk Factors For Colorectal Subsequent Malignancies In Survivors of Childhood Cancer: A Report From The Childhood Cancer Survivor Study
… We developed a novel population-based anatomical colorectal model with substructures for RT dosimetry in late effects studies of childhood cancer survivors; unique to this anatomical model is the incorporation of anatomical variations of 103 unique pediatric patients. We dosimetrically …
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Investigation of Respiratory Motion Management Techniques For Proton and Photon Radiotherapy of Lung Cancer
… especially in proton therapy, to quantify the anatomical variations of all irradiated tissues along the beam path.</p>
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Anatomical studies of canine vascular and ligamentous ear structures with revelance to acute-onset deafness
… of this research was to provide more accurate anatomical descriptions of relevant canine juxta-articular structures to support future physiological studies. The occurrence of hearing loss in dogs and cats following procedures performed under anesthesia was documented. Occurrence was low, with …
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Functional Status of the Donor Limb of Anterolateral Thigh Flap
… circumflex femoral artery. As there are several anatomical variations of the lateral circumflex arterial system, muscle dissection is unavoidable when skin perforator vessels run through the vastus lateralis muscle. In the present study, we prospectively evaluated donor extremity function and …
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Variations in arterial supply via the external and internal carotid arteries to the bony orbit and eyeball in full-term fetuses, infants, children, adolescents, and adults – a South African perspective
… the external carotid artery. A range of arterial variations which may be developmental in origin, or which may develop due to pathologies later in life, may affect the ophthalmic artery in terms of its origin, course, and branching. If clinicians are not aware of the variations occurring in this …
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