Zygomatic Arches.

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Presentation transcript:

Zygomatic Arches

Jug Handle View R

Zygomatic Arches- SMV (jughandle view) Note technique considerably reduced! R Temporal process of zygoma Zygomatic arch zygomatic process of temporal bone

Note difference in technique between SMV - skull and SMV - zygomatic arch

Zygomatic arches- SMV Similar to position for skull or sinus SMV CR perpendicular to IOML,between arches, 1” posterior to outer canthus Tilt image receptor if possible

Zygomatic arches- SMV Evaluation Criteria No rotation of head Arches free from superimposition of overlying structures Arches symmetric Arches not burned out

You make the Call! R R Depression fx. Left zygomatic arch

What do you do when you get a patient with flat cheekbones or depression fx. ?

Single Zygomatic Arch – tangential projection

Single Zygomatic Arch -tangential projection

Single Zygomatic Arch-Tangential projection CR to side of interest, perp. To IOML Tilt top of head 15 degrees away from side of interest ? Rotate midsagital plane15 degrees towards side of interest Bilateral

Tangential projection Single Zygomatic Arch Tangential projection

Zygomatic Arches-AP Axial Occipital Mandible Zygomatic arch

Zygomatic Arch-AP Axial Similar to Towne, except CR enters at glabella instead of 2” above CR 30 deg. Caudad to OML

Paired bones making up superior bony wall of nasal cavity – Nasal bones Paired bones making up superior bony wall of nasal cavity – bridge of nose Along with lacrimal bones, thinnest and most fragile bones of entire human body !!

Nasal Bones

Naso-frontal suture (nasion) Nasal bone Anterior nasal spine Lateral Nasal bones R Naso-frontal suture (nasion) Nasal bone Anterior nasal spine A B C

Projections for Nasal Series Lateral Waters Tangential?

Nasal bones-lateral projection 2 exposures on one film? (No longer- algorithm can’t process on digital) 8x10 lengthwise CR perpendicular to bridge of nose, 1/2” distal to nasion Close collimation L R X

Nasal bones-lateral projection

Nasal Bones-Parieto-acanthial projection Demonstrates displacement of bony nasal septum (Vomer and perp. Plate of ethmoid) depressed fx’s of nasal wings R

Nasal bones- Tangential projection Doesn’t work well on children, large foreheads, protruding front teeth, concave faces

Nasal Bones-Tangential projection