Computed tomography imaging technique and normal computed. In addition, this bone surrounds the middle and inner portions of the ear. Anatomy of the petrous bone ct atlas of human anatomy using crosssectional imaging we have created an atlas of the temporal bone which is an educational tool for studying the normal anatomy of the petrous bone based on an mdct exam of the axial and coronal of the ear and petrous bone. On a lateral view of the temporal bone, such as figure 1. This site is like a library, use search box in the widget to get ebook that you want. The middle ear and the bony labyrinth are breached. Cross sectional imaging of the ear and temporal bone ncbi. Separates the descending portion from the horizontal tympanic segment.
The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum. The temporal bones were scanned in the direct axial and coronal planes using high resolution thin slices without contrast. Ct evaluation of the temporal bone ossicles by using oblique reformations. The ct of the sinuses focuses in on the sinuses though the radiation goes through the entire skull and generally covers the entire set of sinuses sphenoid, maxillary, frontal, ethmoid. The detailed ct anatomy of the temporal bone was documented, complemented by images from live patients. For scans done on children or patients requiring restraint device immobilization, it is optimal to view a coronal mpr image to rule out motion before discharging patient. It shows normal temporal bone anatomy in four imaging planes. Imaging of temporal bone trauma geisel school of medicine. Petrous apex fractures tend to involve the iac and cochlea, explaining the higher prevalence of cn vii and viii dysfunction than with nonpetrous apex fractures fig.
Disease processes in the pontine angle and in the internal acoustic meatus are not discussed. Normal ct anatomy normal anatomic structures of the temporal bone as seen on axial and coronal thinsection ct are demonstrated in figs. Any information contained in this pdf file is automatically generated from digital. Doctors give unbiased, helpful information on indications, contraindications, benefits, and complications. Pdf to master the detailed ct anatomy of the middle and inner ear to make use of several recognizable figures as landmarks for positioning. The aim of this presentation is to demonstrate imaging findings of common diseases of the temporal bone. As temporal bone computed tomography ct has become more sophisticated, more abnormalities of the middle and inner ear have been found. Ct temporal bone with iv contrast img 14158 acquisition a reconstruction reformation other note. Hrct temporal bone anatomy slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The tympanic part of the temporal bone is situated inferiorly to the squamous part and anteriorly to the mastoid part the tympanic part surrounds the external auditory meatus, forming the anterior wall, floor and some of the posterior wall of the bony external acoustic meatus. Combined surgical approaches temporal craniotomy and mastoidectomy by neurosurgical and otological teams are recommended for meningiomas originating in the temporal bone. Basic and advanced temporal bone anatomy using different figures as landmarks.
Ct evaluation of the temporal bone ossicles by using oblique. In this study, we assessed whether ct imaging of the temporal bone by using an ultrahighresolution scan mode combined with iterative reconstruction provides higher spatial resolution and lower image noise than a zaxis ultrahighresolution mode. Ultrahighresolution ct scan of the temporal bone springerlink. A must read for all who interpret temporal bone imaging studies. Bacon 1 involvement of the ossicular chain by temporal bone dis. The temporal bone provides structural support for the skull, while protecting the cerebrum of the brain and surrounding membranes. Mr with and without infusion provided excellent delineation of softtissue tumor margins, muscle infiltration. The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebral cortex. Tympanic part of temporal bone radiology reference article.
Aug 22, 2018 according to both observers, stapedius tendon was more clearly visualized using uhrct than convct p ct scanners. This gallery of images presents the anatomy of the temporal bone by means of ctscan reconstructions. Iac internal auditory canal, ica internal carotid artery, lscc. Styloid process eventhough is closely associated with temporal bone, is not considered as a part of it. Axial thinsection ct image of the temporal bone in a motor vehicle accident victim and complex hearing loss. The temporal bones are paired bones that help make up the sides and base of the skull cranium. An understanding of temporal bone anatomy is crucial in evaluating patients with trauma for temporal bone. Some structures are discussed in more detail with emphasis on related pathology.
Lesions that arise within or involve the iac can be considered together with lesions affecting the cpa cistern. The anatomy of temporal bone is more conspicuous on uhrct than on convct because of its ultrahighresolution detector. The first is the mastoid process, an inferior projection of bone, palpable just behind the ear. Multidetector row ct images, including reformations, better delineate temporal bone anatomy than do singledetector row ct images. Jun 09, 20 imaging of petrous bone part 1 anatomy dr mamdouh mahfouz. Axial ct images show the normal anatomy of the temporal bone from inferior a to superior g. Radiologic and audiologic findings in the temporal bone of. An interactive webbased learning module on the temporal bone has been developed. Planes of scanning axial 30 degrees to anthropological base line parallel to lateral scc. Temporal bone fractures are subdivided into petrous apex and nonpetrous apex fractures. The lower portion of the bone articulates with the mandible, forming the temporomandibular joint of the jaw. It contains the middle and inner portions of the ear, and is crossed by the majority of the cranial nerves. Anatomy and inflammatory and neoplastic processes1 from a clinicalradiologic standpoint, there are a limited number of structures and disease entities in the temporal bone with which one must be familiar in order to proficiently interpret a computed tomographic or. Computed tomography ct of the temporal bone is an important diagnostic imaging tool.
Its lower portion connects with the mandible or jawbone to allow the mouth to open and close. On the right, the external auditory canal, mastoid complexes, and middle ear, including the ossicles and pneumatization are normal. Click download or read online button to get temporal bone book now. Ct imaging of temporal bone can be done by mdct or cone beam ct. Ct and mr imaging are essential crosssectional imaging modalities for assessment of temporal bone anatomy and pathology. If you continue browsing the site, you agree to the use of cookies on this website. Ct imaging anatomy and pathology in multiple imaging planes is very well depicted.
For this purpose, dry skulls with intact ossicles were scanned in axial and coronal projections. Full text get a printable copy pdf file of the complete article 4. The temporal bone contributes to the lower lateral walls of the skull. Apr 15, 2020 the temporal bone articulates with a number of other flat bones of the skull at joints called sutures. To identify pathologically important anatomical landmarks of the temporal bone on ct to provide an overview of the common pathologies affecting the temporal bone background many general radiologists and trainees fear the anatomy and pathology of the temporal bone due to its complex configuration, complicated nomenclature and minute.
Understanding the anatomy of the temporal bone has always been, is and will be a difficult task for doctors of various specialities. Sections parallel to the hard palate direct coronal plane patient head extended in prone or supine with 105 degree plane is perpendicular to the lateral scc sections are parallel to posterior wall of maxillary sinus. Temporal bone anatomy and imaging features of common. The temporal bones are overlaid by the sides of the head known as the temples, and house the structures of the ears. How to read a temporal bone ct temporal bone made ridiculously simple a systematic axial approach thank each one of you for making it happen. The lower seven cranial nerves and the major vessels to and from the brain traverse the temporal bone. Temporal bone or skull base erosion were best seen on ct at bone algorithm.
Interactive webbased learning module on ct of the temporal. Imaging of petrous bone part 1 anatomy dr mamdouh mahfouz. Computed tomographic anatomy of the temporal bone american. Because of its superior contrast resolution, ct was able to demonstrate numerous structures, such as the tympanic membrane, ossicles, and supporting structures, hitherto never or poorly visualized by any other method. It is helpful to examine the region in an organized and sys tematic fashion, going through the same checklist of key structures each time. Introduction temporal bone is a composite structure consisting of tympanic bone, mastoid process, squama and petrosa. This places them lateralto the side ofthe temporal lobes of the brains cerebral cortex, ensuring that the cranium is properly supported and protecting the important structures there. Radiation dose in temporal bone ct imaging can be high due to the requirement of high spatial resolution.
Imaging of the temporal bone has recently been advanced with multidetector ct and highfield mr imaging to the point where radiologists and clinicians must familiarize themselves with anatomy that was previously not resolvable on older generation scanners. Aug 30, 2017 how to read a temporal bone ct temporal bone made ridiculously simple a systematic axial approach thank each one of you for making it happen. Pdf basic and advanced temporal bone anatomy using. The orbital ct will cover the eye sockets and those. Axial sequential ct images of normal temporal bone normal structures. With the recent development of highresolution computed tomography ct, there is a growing need to explore the full potential of this new method in demonstrating the detailed anatomy of the temporal bone. A fracture line arrow traverses the temporal bone obliquely, with features of both transverse and longitudinal type fractures. Computed tomography temporal bone anatomy technique. Pdf basic and advanced temporal bone anatomy using different.
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