Skull, Spine, Pelvis Projections (1 of 8)

Question 1

“What is the anatomical structure identified by the number 1 in this image?

A - Mandibular Sinus
B - Ethmoid Bone
C - Ethmoid Cells
D - Lambdoid Suture”

Answer 1

“Number 1 in this AP axial (Towne) view demonstrates the Lambdoid Suture.

Answer Key:
1 - Lambdoid Suture
2 - Mastoid Cells
3 - Ramus of the Mandible
4 - Foramen Magnum
5 - Diploe”

Question 2

“What is the anatomical structure identified by the number 1 in this image?

A - Maxillary Sinus
B - Nasal Bone
C - Inner Table of the Frontal Bone
D - Mandibular Sinus”

Answer 2

“Number 1 in this Lateral view demonstrates the Maxillary Sinus.

Answer Key:
1 - Maxillary Sinus
2 - Frontal Sinus
3 - Opening of the External Auditory Canal
4 - Pituitary Fossa
5 - Inner Table of the Frontal Bone”

Question 3

“What is the anatomical structure identified by the number 1 in this image?

A. Palatine Bone
B. Inferior Turbinate
C. Opening of the External Auditory Canal
D. Frontal Sinus”

Answer 3

“Number 1 in this PA axial (Caldwell) view demonstrates the Outer table of the parietal bone.

Answer Key:
1 - Inferior Turbinate
2 - Outer Table of the Parietal Bone
3 - Maxillary Sinus
4 - Internal Auditory Canal
5 - Sphenoid Bone”

Question 4

“What is the anatomical structure identified by the number 1 in this image?

A - Sphenoid Bone
B - Occipital Bone
C - Foramen Magnum
D - Frontal Sinus”

Answer 4

“Number 1 in this PA view demonstrates the Sphenoid Bone.

Answer Key:
1 - Sphenoid Bone
2 - Frontal Sinus
3 - Angle of the Mandible
4 - Ethmoid Cells
5 - Innominate Line”

Question 5

“What is the anatomical structure identified by the number 1 in this image?

A - Inferior Turbinate
B - Palatine Bone
C - Condyle of the Mandible
D - Frontal Sinus”

Answer 5

“Number 1 in this Submentovertex (full basal) view demonstrates the Condyle of the Mandible.

Answer Key:
1 - Condyle of the Mandible
2 - Internal Auditory Canal
3 - Dens of the Axis
4 - Zygomatic Bone
5 - Sphenoidal Sinus”

Question 6

“What is the anatomical structure identified by the number 1 in this image?

A - Lacrimal Bone
B - Petrous Portion of the Temporal Bone
C - Greater Wing of the Sphenoid
D - Inferior Turbinate”

Answer 6

“Number 1 in this Trauma cross-table view demonstrates the Petrous portion of the temporal bone.

Answer Key:
1 - Petrous Portion of the Temporal Bone
2 - Pituitary Fossa
3 - Posterior Arch of the Atlas
4 - Occipital Protuberance
5 - Hard Palate”

Question 7

“What is the anatomical structure identified by the number 1 in this image?

A - Internal Auditory Canal
B - Inferior Turbinate
C - Nasal Bone
D - Ethmoid Cells”

Answer 7

“Number 1 in this Trauma AP axial (reverse Caldwell) view demonstrates the Internal Auditory Canal.

Answer Key:
1 - Internal Auditory Canal
2 - Lateral Wall of the Orbit
3 - Dens of the Axis
4 - Ethmoid Cells
5 - Mandible”

Question 8

“What is the anatomical structure identified by the number 1 in this image?

A - Nasal Bone
B - Crista Galli
C - Frontal Bone
D - Petrous Portion of the Temporal Bone”

Answer 8

“Number 1 in this Trauma AP view demonstrates the Crista Galli.

Answer Key:
1 - Crista Galli
2 - Lambdoid Suture
3 - Nasal Septum
4 - Greater Wing of Sphenoid
5 - Angle of the Mandible”

Question 9

“What is the anatomical structure identified by the number 1 in this image?

A - Root Canal
B - Frontal Sinus
C - Occipital Bone
D - Angle of the Mandible”

Answer 9

“Number 1 in this Trauma AP axial (Towne) view demonstrates the Occipital Bone.

Answer Key:
1 - Occipital Bone
2 - Foramen Magnum
3 - Condyle of the Mandible
4 - Semicircular Canals
5 - Temporomandibular Joint”

Question 10

“What is the anatomical structure identified by the number 2 in this image?

A - Maxillary Sinus
B - Diploe
C - Mastoid Cells
D - Inferior Turbinate”

Answer 10

“Number 2 in this AP axial (Towne) view demonstrates the Mastoid cells.

Answer Key:
1 - Lambdoid Suture
2 - Mastoid Cells
3 - Ramus of the Mandible
4 - Foramen Magnum
5 - Diploe

Question 11

“What is the anatomical structure identified by the number 2 in this image?

A. Palatine Bone
B. Inferior Turbinate
C. Opening of the External Auditory Canal
D. Frontal Sinus”

Answer 11

“Number 2 in this Lateral view demonstrates the Frontal sinus.

Answer Key:
1 - Maxillary Sinus
2 - Frontal Sinus
3 - Opening of the External Auditory Canal
4 - Pituitary Fossa
5 - Inner Table of the Frontal Bone”

Question 12

“What is the anatomical structure identified by the number 2 in this image?

A - Mastoid Cells
B - Outer Table of the Parietal Bone
C - Temporal Bone
D - Sphenoid Bone

Answer 12

“Number 2 in this PA axial (Caldwell) view demonstrates the Outer table of the parietal bone.

Answer Key:
1 - Inferior Turbinate
2 - Outer Table of the Parietal Bone
3 - Maxillary Sinus
4 - Internal Auditory Canal
5 - Sphenoid Bone

Question 13

“What is the anatomical structure identified by the number 2 in this image?

A - Foramen Magnum
B - Stylomastoid Foramen
C - Lambdoid Suture
D - Frontal Sinus

Answer 13

“Number 2 in this PA view demonstrates the Angle of the Mandible.

Answer Key:
1 - Sphenoid Bone
2 - Frontal Sinus
3 - Angle of the Mandible
4 - Ethmoid Cells
5 - Innominate Line

Question 14

“What is the anatomical structure identified by the number 2 in this image?

A - Internal Auditory Canal
B - Mandibular Sinus
C - Ethmoidal Groove
D - Vomer

Answer 14

“Number 2 in this Submentovertex (full basal) view demonstrates the Internal Auditory Canal.

Answer Key:
1 - Condyle of the Mandible
2 - Internal Auditory Canal
3 - Dens of the Axis
4 - Zygomatic Bone
5 - Sphenoidal Sinus

Question 15

“What is the anatomical structure identified by the number 2 in this image?

A - Sphenoid Bone
B - Temporomandibular Joint
C - Pituitary Fossa
D - Occipital Protuberance

Answer 15

“Number 2 in this Trauma cross-table view demonstrates the Pituitary Fossa.

Answer Key:
1 - Petrous Portion of the Temporal Bone
2 - Pituitary Fossa
3 - Posterior Arch of the Atlas
4 - Occipital Protuberance
5 - Hard Palate

Question 16

“What is the anatomical structure identified by the number 2 in this image?

A - Lateral Wall of the Orbit
B - Inferior Turbinate
C - Nasal Bone
D - Ethmoid Cells”

Answer 16

“Number 2 in this Trauma AP axial (reverse Caldwell) view demonstrates the Lateral Wall of the Orbit.

Answer Key:
1 - Internal Auditory Canal
2 - Lateral Wall of the Orbit
3 - Dens of the Axis
4 - Ethmoid Cells
5 - Mandible

Question 17

“What is the anatomical structure identified by the number 2 in this image?

A - Root Canal
B - Dens of the Axis
C - Frontal Bone
D - Lambdoid Suture

Answer 17

“Number 2 in this Trauma AP view demonstrates the Lambdoid Suture.

Answer Key:
1 - Crista Galli
2 - Lambdoid Suture
3 - Nasal Septum
4 - Greater Wing of Sphenoid
5 - Angle of the Mandible

Question 18

“What is the anatomical structure identified by the number 2 in this image?

A - Root Canal
B - Frontal Sinus
C - Foramen Magnum
D - Angle of the Mandible

Answer 18

“Number 2 in this Trauma AP axial (Towne) view demonstrates the Foramen Magnum.

Answer Key:
1 - Occipital Bone
2 - Foramen Magnum
3 - Condyle of the Mandible
4 - Semicircular Canals
5 - Temporomandibular Joint

Question 19

“What is the anatomical structure identified by the number 3 in this image?

A - Mandibular Sinus
B - Ethmoid Bone
C - Ethmoid Cells
D - Ramus of the Mandible

Answer 19

“Number 3 in this AP axial (Towne) view demonstrates the Ramus of the Mandible.

Answer Key:
1 - Lambdoid Suture
2 - Mastoid Cells
3 - Ramus of the Mandible
4 - Foramen Magnum
5 - Diploe

Question 20

“What is the anatomical structure identified by the number 3 in this image?

A - Opening of the External Auditory Canal
B - Occipital Bone
C - Frontal Sinus
D - Sphenoid Bone”

Answer 20

“Number 3 in this Lateral view demonstrates the Opening of the External Auditory Canal.

Answer Key:
1 - Maxillary Sinus
2 - Frontal Sinus
3 - Opening of the External Auditory Canal
4 - Pituitary Fossa
5 - Inner Table of the Frontal Bone

Question 21

“What is the anatomical structure identified by the number 3 in this image?

A - Nasal Bone
B - Foramen Magnum
C - Zygomatic Arch
D - Maxillary Sinus

Answer 21

“Number 3 in this PA axial (Caldwell) view demonstrates the Maxillary Sinus.

Answer Key:
1 - Inferior Turbinate
2 - Outer Table of the Parietal Bone
3 - Maxillary Sinus
4 - Internal Auditory Canal
5 - Sphenoid Bone

Question 22

“What is the anatomical structure identified by the number 3 in this image?

A - Angle of the Mandible
B - Vomer
C - Internal Auditory Canal
D - Sphenoid Bone

Answer 22

“Number 3 in this PA view demonstrates the Mastoid Cells.

Answer Key:
1 - Sphenoid Bone
2 - Frontal Sinus
3 - Angle of the Mandible
4 - Ethmoid Cells
5 - Innominate Line

Question 23

“What is the anatomical structure identified by the number 3 in this image?

A - Lacrimal Bone
B - Temporomandibular Joint Fossa
C - Dens of the Axis
D - Ramus of the Mandible”

Answer 23

“Number 3 in this Submentovertex (full basal) view demonstrates the Dens of the Axis.

Answer Key:
1 - Condyle of the Mandible
2 - Internal Auditory Canal
3 - Dens of the Axis
4 - Zygomatic Bone
5 - Sphenoidal Sinus

Question 24

“What is the anatomical structure identified by the number 3 in this image?

A - Sphenoid Bone
B - Temporomandibular Joint
C - Posterior Arch of the Atlas
D - Occipital Protuberance

Answer 24

“Number 3 in this Trauma cross-table view demonstrates the Posterior Arch of the Atlas.

Answer Key:
1 - Petrous Portion of the Temporal Bone
2 - Pituitary Fossa
3 - Posterior Arch of the Atlas
4 - Occipital Protuberance
5 - Hard Palate

Question 25

"What is the anatomical structure identified by the number 3 in this image? A - Dens of the Axis B - Petrous Portion of the Temporal Bone C - Posterior Arch of the Atlas D - Roof of the Orbit

Answer 25

"Number 3 in this Trauma AP axial (reverse Caldwell) view demonstrates the Dens of the Axis. Answer Key: 1 - Internal Auditory Canal 2 - Lateral Wall of the Orbit 3 - Dens of the Axis 4 - Ethmoid Cells 5 - Mandible

Question 26

"What is the anatomical structure identified by the number 3 in this image? A - Petrous Portion of the Temporal Bone B - Zygomatic Bone C - Nasal Septum D - Maxilla

Answer 26

"Number 3 in this Trauma AP view demonstrates the Nasal septum. Answer Key: 1 - Crista Galli 2 - Lambdoid Suture 3 - Nasal Septum 4 - Greater Wing of Sphenoid 5 - Angle of the Mandible

Question 27

"What is the anatomical structure identified by the number 3 in this image? A - Condyle of the Mandible B - Mastoid Cells C - Maxilla D - Arcuate Eminence

Answer 27

"Number 3 in this Trauma AP axial (Towne) view demonstrates the Condyle of the Mandible. Answer Key: 1 - Occipital Bone 2 - Foramen Magnum 3 - Condyle of the Mandible 4 - Semicircular Canals 5 - Temporomandibular Joint

Question 28

"What is the anatomical structure identified by the number 4 in this image? A - Maxillary Sinus B - Diploe C - Foramen Magnum D - Inferior Turbinate

Answer 28

"Number 4 in this AP axial (Towne) view demonstrates the Foramen Magnum. Answer Key: 1 - Lambdoid Suture 2 - Mastoid Cells 3 - Ramus of the Mandible 4 - Foramen Magnum 5 - Diploe

Question 29

"What is the anatomical structure identified by the number 4 in this image? A - Zygomatic Bone B - Pituitary Fossa C - Inner Table of the Frontal Bone D - Ramus of the Mandible

Answer 29

"Number 4 in this Lateral view demonstrates the Pituitary Fossa. Answer Key: 1 - Maxillary Sinus 2 - Frontal Sinus 3 - Opening of the External Auditory Canal 4 - Pituitary Fossa 5 - Inner Table of the Frontal Bone

Question 30

"What is the anatomical structure identified by the number 4 in this image? A - Mastoid Cells B - Internal Auditory Canal C - Temporal Bone D - Sphenoid Bone

Answer 30

"Number 4 in this PA axial (Caldwell) view demonstrates the Internal Auditory Canal. Answer Key: 1 - Inferior Turbinate 2 - Outer Table of the Parietal Bone 3 - Maxillary Sinus 4 - Internal Auditory Canal 5 - Sphenoid Bone

Question 31

"What is the anatomical structure identified by the number 4 in this image? A - Ethmoid Cells B - Maxillary Sinus C - Frontal Sinus D - Vomer

Answer 31

"Number 4 in this PA view demonstrates the Ethmoid Cells. Answer Key: 1 - Sphenoid Bone 2 - Frontal Sinus 3 - Angle of the Mandible 4 - Ethmoid Cells 5 - Innominate Line

Question 32

"What is the anatomical structure identified by the number 4 in this image? A - Maxillary Sinus B - Mastoid Antrum C - Zygomatic Bone D - Sphenoid Bone

Answer 32

"Number 4 in this Submentovertex (full basal) view demonstrates the Zygomatic Bone. Answer Key: 1 - Condyle of the Mandible 2 - Internal Auditory Canal 3 - Dens of the Axis 4 - Zygomatic Bone 5 - Sphenoidal Sinus

Question 33

"What is the anatomical structure identified by the number 4 in this image? A - Zygomatic Bone B - Maxillary Sinus C - Occipital Bone D - Occipital Protuberance

Answer 33

"Number 4 in this Trauma cross-table view demonstrates the Occipital Protuberance. Answer Key: 1 - Petrous Portion of the Temporal Bone 2 - Pituitary Fossa 3 - Posterior Arch of the Atlas 4 - Occipital Protuberance 5 - Hard Palate

Question 34

"What is the anatomical structure identified by the number 4 in this image? A - Zygomatic Bone B - Ethmoid Cells C - Nasal Septum D - Nasal Cartilage

Answer 34

"Number 4 in this Trauma AP axial (reverse Caldwell) view demonstrates the Ethmoid Cells. Answer Key: 1 - Internal Auditory Canal 2 - Lateral Wall of the Orbit 3 - Dens of the Axis 4 - Ethmoid Cells 5 - Mandible

Question 35

"What is the anatomical structure identified by the number 4 in this image? A - Mandible B - Greater Wing of the Sphenoid C - Maxillary Sinus D - Nasal Cartilage

Answer 35

"Number 4 in this Trauma AP view demonstrates the Greater Wing of Sphenoid. Answer Key: 1 - Crista Galli 2 - Lambdoid Suture 3 - Nasal Septum 4 - Greater Wing of Sphenoid 5 - Angle of the Mandible

Question 36

"What is the anatomical structure identified by the number 4 in this image? A - Maxillary Sinus B - Sphenoid Bone C - Mandible D - Semicircular Canals

Answer 36

"Number 4 in this Trauma AP axial (Towne) view demonstrates the Semicircular canals. Answer Key: 1 - Occipital Bone 2 - Foramen Magnum 3 - Condyle of the Mandible 4 - Semicircular Canals 5 - Temporomandibular Joint

Question 37

"What is the anatomical structure identified by the number 5 in this image? A - Diploe B - Parietal Bone C - Pituitary Fossa D - Maxillary Sinus

Answer 37

"Number 5 in this AP axial (Towne) view demonstrates the Diploe. Answer Key: 1 - Lambdoid Suture 2 - Mastoid Cells 3 - Ramus of the Mandible 4 - Foramen Magnum 5 - Diploe

Question 38

"What is the anatomical structure identified by the number 5 in this image? A. Palatine Bone B. Inner Table of the Frontal Bone C. Opening of the External Auditory Canal D. Frontal Sinus

Answer 38

"Number 5 in this Lateral view demonstrates the Inner Table of the Frontal Bone. Answer Key: 1 - Maxillary Sinus 2 - Frontal Sinus 3 - Opening of the External Auditory Canal 4 - Pituitary Fossa 5 - Inner Table of the Frontal Bone

Question 39

"What is the anatomical structure identified by the number 5 in this image? A - Nasal Bone B - Foramen Magnum C - Zygomatic Arch D - Sphenoid Bone

Answer 39

"Number 5 in this PA axial (Caldwell) view demonstrates the Sphenoid Bone. Answer Key: 1 - Inferior Turbinate 2 - Outer Table of the Parietal Bone 3 - Maxillary Sinus 4 - Internal Auditory Canal 5 - Sphenoid Bone

Question 40

"What is the anatomical structure identified by the number 5 in this image? A - Sphenoid Bone B - Frontal Sinus C - Innominate Line D - Mandibular Sinus

Answer 40

"Number 5 in this PA view demonstrates the Innominate Line. Answer Key: 1 - Sphenoid Bone 2 - Frontal Sinus 3 - Angle of the Mandible 4 - Ethmoid Cells 5 - Innominate Line

Question 41

"What is the anatomical structure identified by the number 5 in this image? A - Sphenoid Sinus B - Nasal Septum C - Stylomastoid Foramen D - Lambdoid Suture

Answer 41

"Number 5 in this Submentovertex (full basal) view demonstrates the Sphenoidal sinus. Answer Key: 1 - Condyle of the Mandible 2 - Internal Auditory Canal 3 - Dens of the Axis 4 - Zygomatic Bone 5 - Sphenoidal Sinus

Question 42

"What is the anatomical structure identified by the number 5 in this image? A - Zygomatic Bone B - Maxillary Sinus C - Occipital Bone D - Hard Palate

Answer 42

"Number 5 in this Trauma cross-table view demonstrates the Hard Palate. Answer Key: 1 - Petrous Portion of the Temporal Bone 2 - Pituitary Fossa 3 - Posterior Arch of the Atlas 4 - Occipital Protuberance 5 - Hard Palate

Question 43

"What is the anatomical structure identified by the number 5 in this image? A - Nasal Bone B - Roof of the Orbit C - Mandible D - Zygomatic Arch

Answer 43

"Number 5 in this Trauma AP axial (reverse Caldwell) view demonstrates the Mandible. Answer Key: 1 - Internal Auditory Canal 2 - Lateral Wall of the Orbit 3 - Dens of the Axis 4 - Ethmoid Cells 5 - Mandible

Question 44

"What is the anatomical structure identified by the number 5 in this image? A - Mandible B - Angle of the Mandible C - Maxillary Sinus D - Nasal Cartilage

Answer 44

"Number 5 in this Trauma AP view demonstrates the Angle of the Mandible. Answer Key: 1 - Crista Galli 2 - Lambdoid Suture 3 - Nasal Septum 4 - Greater Wing of Sphenoid 5 - Angle of the Mandible

Question 45

"What is the anatomical structure identified by the number 5 in this image? A - Hard Palate B - Temporomandibular Joint C - Ethmoid Bone D - Semicircular Canals

Answer 45

"Number 5 in this Trauma AP axial (Towne) view demonstrates the Temporomandibular Joint. Answer Key: 1 - Occipital Bone 2 - Foramen Magnum 3 - Condyle of the Mandible 4 - Semicircular Canals 5 - Temporomandibular Joint