Computed tomographic anatomy of the temporal bone ajnr. Nov 01, 2001 this fact is reflected in the space devoted to mr imaging. Reformation in ct of the temporal bone radiology key. Computed tomography ct has revolutionized imaging of the temporal bone. Pdf basic and advanced temporal bone anatomy using different. This latest edition of one of the great landmark treatises in neuroradiology does great credit to the ingenuity. On the right, the external auditory canal, mastoid complexes, and middle ear, including the ossicles and pneumatization are normal. Imaging of temporal bone trauma geisel school of medicine. This portion of the temporal bone is located posteriorly. It protects the part of your brain that controls hearing, speech, memory, and behavior. 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. Any information contained in this pdf file is automatically generated from digital material. Analysis of anatomic variations in temporal bone by radiology article in journal of international advanced otology 82. After description of indications for imaging and the crosssectional imaging anatomy of the area, subsequent chapters address the various diseases and conditions that affect the temporal bone and are likely to be encountered regularly in clinical practice.
Direct sagittal ct in the evaluation of temporal bone disease ajnr. First of six axial bone ct images of the left temporal bone presented from superior to inferior shows the. A, ct image shows occipitomastoid suture arrowheads. Necrotizing lesion in the floor of the external auditory canal 1. This atlas allows you to scroll through ct slices of the temporal bone in four different planes. The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum. The squama forms the anterior and upper part of the bone, and is scalelike, thin, and translucent. Temporal bone fracture is suggested by battle sign postauricular ecchymosis and bleeding from. Basic and advanced temporal bone anatomy using different figures as landmarks. Normal pattern and morphology 551 the pneumatization of 141 normal temporal bones on computed tomography ct was evaluated in 100 patients age range, 685 years, because of the controversy surrounding the sclerotic squamomastoid mastoid, temporal bones with this finding were discarded. Temporal bone anatomy this presentation was prepared by hugh curtin, md. Highresolution ct scans of the temporal bone in 12 patients showed longitudinal fracture of the temporal bone in all cases. Categorization of temporal bone fractures should include a descriptor for fracture direction, the presence or absence of labyrinthine involvement, and the segment of temporal bone. Computed tomography ct and magnetic reso nance imaging mri have largely supplanted conventional radiography in the evaluation of temporal bone.
The base is fused with the internal surfaces of the squama and mastoid portion. The temporal bone is one of the most important calvarial and skull base bones. Pdf imaging of congenital temporal bone anomalies michael. Combined surgical approaches temporal craniotomy and mastoidectomy by neurosurgical and otological teams are recommended for meningiomas originating in the temporal bone. Analysis of anatomic variations in temporal bone by. Ct is the imaging modality of choice for most of the pathologic conditions of the temporal bone, especially for those of the middle ear. Spread of infection to the facial nerve at the point where it exits the stylomastoid foramen 3, or in its vertical portion 4, is a serious risk and complication. The london temporal bone dissection course perfection in dissection 15th to 17th june 2020 course fee. Giantcell tumors gcts are rare lesions of the temporal bone that are most commonly found at the epiphysis of long bones.
The temporal bones were scanned in the direct axial and coronal planes using high resolution thin slices without contrast. It is an ideal resource for all radiologists, neuroradiologists, head and neck radiologists, and residents in these specialties. Temporal bone histology and radiology atlas sujana s. Interpretation of temporal bone imaging is challenging for most general radiologists, as the temporal bone is an anatomically highly complex region. 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 magnetic resonance imaging study of the temporal bone. Computed tomography ct of the temporal bone is an important diagnostic imaging tool. Clinically, erosive bone lesions 2 with purulent debris and denuded bone were evident. Series of axial bone algorithm ct images show the labyrinthine a, tympanic b, and mastoid segments of the facial nerve c arrows. Our systematic ct analysis of the temporal bone was under taken to.
There are a number of openings and canals in the temporal bone through which structures enter and. B, from more cranial slice than a, ct image shows anterior part of suture arrowhead. Neuroimag clin n am 14 2004 721 760 imaging of the temporal bone h. Temporal bone fracture radiology reference article. The temporal bone is very complex and consists of five parts 1,2 squamous part. This gallery of images presents the anatomy of the temporal bone by means of ctscan reconstructions. Ct sections are quite satisfactory for imaging the anatomy of the temporal. Temporal lobe injury in temporal bone fractures radiology. Multidetector temporal bone computed tomography examinations should be performed in patients with a clinical or radiographic suspicion of temporal bone fracture. From the department of radiology, massachusetts eye and ear infirmary, 243 charles st, boston, ma 02114. 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. More advanced radiologists will appreciate the additional detail provided by the microimaging techniques combined with the beautifully reconstructed and reformatted images.
Eac squamous cell carcinoma is the most common malignancy of the eac. The aim of this presentation is to demonstrate imaging findings of common diseases of the temporal bone. Pdf basic and advanced temporal bone anatomy using. Temporal bone imaging medical radiology kindle edition by.
Computed tomography temporal bone anatomy technique. The textbook of radiology and imaging 7th edition pdf free download file has been uploaded to our online repository for the safer downloading of the file. Planes of scanning axial 30 degrees to anthropological base line parallel to lateral scc. Disruption of the ossicles was noted in 2 fractures. Christian davidson, md department of radiology, veterans affairs salt lake city health care system, university of utah, 500 south foothill drive, salt lake city, ut 84148, usa. Tmj green arrow and the phlegmone in the masticator space green star. Antrly the tensor tympani muscle is seen passing postrly in its canal, around the processus cochleariformis to reach the neck of the malleus. Imaging of the temporal bones remains one of the most challenging aspects of head and neck radiology, not only for the general diagnostic radiologist and the neuroradiologist in training but also for the experienced neuroradiologist. They have a prevalence of 3% of all trauma patients in one series 6. Temporal bone pseudofractures can be divided into three categories. The lower portion of the bone articulates with the mandible, forming the temporomandibular joint of the jaw.
Full text get a printable copy pdf file of the complete article 4. They are highly irregular bones with extensive muscular attachments and articulations with surrounding bones. Poster pdf available march 2017 with 5,1 reads how we measure reads. This latest edition of one of the great landmark treatises in neuroradiology does great credit to the ingenuity and hard work of drs. Computed tomography of temporal bone pneumatization.
The detectors are collimated so that only the central 1. And we use stateoftheart imaging technology at all of our locations, at abington memorial hospital and at lansdale hospital. Analysis of anatomic variations in temporal bone by radiology. May 11, 2020 the temporal bones are a pair of bilateral, symmetrical bones that constitute a large portion of the lateral wall and base of the skull. The invention and application of fine slice mdct has revolutionised imaging of the temporal bone and inner ear, providing greater resolution and enabling more accurate evaluation. The middle ear consists of the tympanic cavity and. The primary learning objectives are to train access to the. Temporal bone fractures are subdivided into petrous apex and nonpetrous apex fractures. Temporal bone anatomy is complex, and further complicated by the small size and threedimensional orientation of associated structures. This book provides a complete overview of imaging of normal and diseased temporal bone. If you would like to enlarge the presentation or view corresponding notes, select the open in a new window icon, which is located on the button right of the presentation. This book is an essential reference for a multidisciplinary approach to assessing diseases affecting the temporal bone.
Temporal bone imaging medical radiology kindle edition. Authoritative and lavishly illustrated, this bestselling reference returns in a fourth edition with comprehensive coverage of the current imaging strategies for the evaluation of disease processes affecting the temporal bone and its intricate anatomy. Some structures are discussed in more detail with emphasis on related pathology. We present fine slice mdct multiplanar reformatted images through the temporal bone, with relevant structures of the anatomy clearly labelled. You have two temporal bones, one on each side of your head. It contains the middle and inner portions of the ear, and is crossed by the majority of the cranial nerves. Although ct remains the mainstay in temporal bone radiology, this text shows that, in some cases, mr imaging can either supplement the ct, making certain findings more definitive, or it can better elucidate the abnormalities. Temporal bone fracture is thought to occur in 20% range 1422% of all calvarial fractures. Also part of the diagnostic imaging book sub series med radiol diagn imaging. Standard noncontrastenhanced ct imaging showed adjacent temporal lobe contusions in 6 46% of the fractures. The latter is used to remove the mixing of bone dust with water john et al. Single oblique reconstruction in the plane of the superior semicircular canal ssc short axis of the temporal bone.
Temporal bone fracture is usually a sequela of significant blunt head injury. Early identification of temporal bone trauma is essential to managing the injury and avoiding complications. In addition to potentially damage to hearing and the facial nerve, associated intracranial injuries, such as extraaxial hemorrhage, diffuse axonal injury and cerebral contusions are common. Now, in this section of the article, you will be able to get access to the textbook of radiology and imaging 7th edition pdf free download file in. The human temporal bone is an extremely complex structure. In this article, we shall look at the different parts of the temporal bone, their articulations, and any. The temporal bone contributes to the lower lateral walls of the skull. Dec 27, 2015 diagnostic imaging of temporal bone 1. Pdf from a clinicalradiologic standpoint, there are a limited number of structures and disease entities in the temporal bone with which one. On a lateral view of the temporal bone, such as figure 1. 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.
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