Sasan Dabiri TEMPORAL BONE IMAGINGtums.ac.ir/files/s-dabiri/Temporal Imaging.pdf · IMAGING...
Transcript of Sasan Dabiri TEMPORAL BONE IMAGINGtums.ac.ir/files/s-dabiri/Temporal Imaging.pdf · IMAGING...
TEMPORAL BONE IMAGINGSasan Dabiri, M.D.
Assistant Professor
Department of ORL-HNS
Amir Alam Hospital - TUMS
IMAGING MODALITIES
CT
Bone
Soft
Without Contrast
With Contrast
MR
Spin Echo
Single SE
T1 , T1+
T2 ,
Proton Density
Multiple SE
FSE , TSE
Inversion Recovery
STIR , FLAIR
MR
Gradient Echo
Diffusion Weighted
EPI
Non-EPI
Single-shot
Multi-shot
Balanced GE (FIESTA)
Steady State GE (FISP)
Hybrid Echo
Anatomy is the Basis of Surgery,
it informs the head,
guides the hand, and
familiarizes the heart to
a kind of necessary inhumanity.William Hunter
1718 - 1783
www.boundless.com
TEMPORAL COMPARTMENTS
External Auditory Canal
Middle Ear and Mastoid
Inner Ear Cochlea
Vestibule
Semicircular Canals
Internal Auditory Canal
Petrous Apex
Cerebello-Pontine Angle
Facial Nerve
CORONAL PLANE – RIGHT EAR
CORONAL PLANE – RIGHT EAR
CORONAL PLANE – RIGHT EAR
CORONAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
AXIAL PLANE – RIGHT EAR
EAC Cavity
Cochlea
SCCs
IACVestibule
AXIAL PLANE – RIGHT EAR
Normal Imaging
NORMAL FINDINGS
Pseudo-fractures
Extrinsic Fissures &
Sutures
NORMAL FINDINGS
Pseudo-fractures
Intrinsic Fissures
Petrotymanic or glaserian(chorda)
Petrosquamosal (koerner)
Tympanosquamosal (align to ant. of EAC)
Tympanomastoid (align to post. of EAC)
Abnormal Findings
DIFFERENTIAL DIAGNOSES
Common External Auditory Canal Abnormalities
Congenital
Atresia
Inflammatory – Infection
Cholesteatoma
Skull base Osteomyelitis
Neoplasm
Benign : Osteoma , Exostosis
Malignant : SCC
DIFFERENTIAL DIAGNOSES
Common Middle Ear & Mastoid Abnormalities
Congenital
Vascular (carotid, jugular)
Inflammatory – Infection
Cholesteatoma
Mastoiditis
Colesterol Granuloma
Neoplasm
Benign : Glomus
Malignant : Metastasis
DIFFERENTIAL DIAGNOSES
Common Inner Ear Abnormalities
Congenital
Large Vestibular Aqueduct
Semicircular canal Dehiscence
Otosclerosis
Inflammatory – Infection
Labyrinthitis
Neoplasm
Schwannoma
Endolymphatic Sac Tumor
DIFFERENTIAL DIAGNOSES
Common Petrous Apex Abnormalities
Pseudo-lesions
Congenital
Cephalocele
Inflammatory – Infection
Petrous Apicitis
Cholesterol Granuloma
Neoplasm
Chondrosarcoma
Metastasis
DIFFERENTIAL DIAGNOSES
Common Facial Nerve Abnormalities
Congenital
Venous Malformation
Inflammatory – Infection
Bell’s palsy (herpetic neuralgia)
Neoplasm
Schwannoma
Perineural Tumor spread
REFERENCES
o https://www.boundless.com/physiology/textbooks/boundless-anatomy-and-physiology-textbook/the-skeletal-system-7/the-skull-79/cranial-bones-459-8856/ (last accessed: Jul 2015)
o http://www.med.wayne.edu/diagRadiology/Anatomy_Modules/axialpages/Overview.html(last accessed: Jul 2015)
o http://teachmeanatomy.info/head/osteology/temporal-bone/ (last accessed: Jul 2015)
o Imaging of the Head & Neck, Mafee
o Head & Neck Imaging, Som
o Imaging of the Temporal Bone, Radiolodic clinics
THANKS FOR YOUR ATTENTION