| A | B |
|---|
| Which part of the patient's face is touching the upright bucky, or table, for a parietoacanthial projection (Waters method)? | chin |
| Which of the following lines is placed as nearly parallel to the image receptor as possible for the SMV projection of the zygomatic arches? | IOML |
| At which level will the central ray be placed for the SMV projection of the zygomatic arches? | At a level one inch posterior to the outer canthus |
| At which level will the central ray be placed for the tangential projection of the zygomatic arch? | At the level one inch posterior to the outer canthus |
| Which reference line is perpendicular to the IR for the PA and PA axial mandibular rami? | OML |
| Which sinus is located immediately below the sella turcica? | Sphenoidal sinus |
| The largest sinus is the: | maxillary sinus |
| Patients who are having an examination of the paranasal sinuses should always be examined in the upright position to | 1. demonstrate the presence or absence of fluid. 2. differentiate between fluid and other pathological conditions |
| For a lateral projection of the paranasal sinuses the central ray is directed: | 1 inch posterior to the outer canthus. |
| Which of the following should be clearly demonstrated on a lateral projection of the paranasal sinus? | 1. All four sinus groups 2. Superimposed orbital roofs 3. Superimposed mandibular rami |
| Which projection will best demonstrate the frontal and anterior ethmoidal sinuses? | PA axial (Caldwell) |
| When using the angled grid technique for the PA axial (Caldwell method) projection of the sinuses, the vertical grid device must be angled _____ degrees. | 15 |
| Which of the following must be projected below the maxillary sinuses for the parietoacanthial projection (Waters method) of the sinuses? | petrous Ridges |
| The parietoacanthial projection (Waters method) of the sinuses requires the orbitomeatal line to be placed how many degrees from the plane of the image receptor? | 37 degrees |
| Which sinus is projected through the mouth on the open-mouth modification of the Waters method? | sphnoidal |
| Which of the following projections will best demonstrate the maxillary sinuses? | Waters |
| To successfully demonstrate the ethmoidal and sphenoidal sinuses on the SMV projection, which of the following must occur? 1. The patient must be recumbent. 2. The infraorbitomeatal line must be parallel with the IR. 3. The central ray must be perpendicular to the infraorbitomeatal line and horizontal. | 2. The infraorbitomeatal line must be parallel with the IR. 3. The central ray must be perpendicular to the infraorbitomeatal line and horizontal. |
| At which level should the central ray enter the base of the skull for the SMV projection of the sinuses? | 3/4 inches anterior to the EAM |
| Which projections will demonstrate the ethmoidal sinuses? | 1. Latera l2. PA axial (Caldwell) 3. SMV |
| The respiration phase for all projections of the facial bones and sinuses is: | Suspended |
