Radiography of the Chest Flashcards
PA Projection Pt Position
Standing infront- VGD/VCH-anterior thorax dependent
PA Projection Comfort and Part Position
Both UE-raised-flexed-elbows-dorsum of hands in contact-hips-rotated forward to draw the scapula laterally and prevent superimposition with the lungs
Both LE extended- separated and weight distributed equally
Shoulders-depressed to prevent clavicles to superimpose with lung apices
Chin-raised-top of the VGD
MSP-coincide-MP of IR
Establish-RP -T7 (inferior border of scapulae) by palpation
PA Projection IR size and placement
CXT 14X17-VGD/VCH- longitudinal- MP- coincide- RP
Upper border of the IR-approximately 1 1⁄2 -2 inches from shoulder level
CRD- perpendicular- at 72”-SID-RP-exits-MP- IR/ cassette
To demo thoracic viscera, the air-filled trachea, well expanded lungs, diaphragmatic dome, heart and aortic knob
PA Projection
Why is exposure made at the end of second full suspended inspiration/ inhalation?
- Allow the lungs to expand
- Widen intercostal spaces
- Depress the diaphragm
- Costophrenic angles/sulci sharp
PA Projection
Prominent at the end of full expiration/exhalation
Vascular markings
PA Projection
For certain conditions, such as pneumothorax and the presence of a foreign body, radiographs are sometimes made at —
the end of full inspiration and expiration
PA Projection
For cardiac studies, patient is given a bolus of barium sulfate and instructed take a deep breath and to swallow upon instruction by the technologist. This will outline the (1) and (2).
- posterior heart
- aorta
PA Projection
- (1) ribs should be visible
- Grid technique is used for (2) within the lung fields
- Chest x-ray can be done in (3)/ (4)
- Chest x-ray is primarily done in (5) to prevent (6)
- 10 posterior
- opaque areas (foreign body)
- seating
- bedside radiography
- upright
- pulmonary engorgement/ dilatation
Lateral projection (Upright-Standing) Pt Position
Standing-L/R lateral position-infront of VGD/VCH
Lateral projection (Upright-Standing) Comfort position
Both UE-raised-flexed at elbows-placed on top of head with hands grasping the elbows to avoid superimposition
Both LE-extended-wt. distributed equally
Lateral projection (Upright-Standing) Part Position
Thorax-adjusted in lateral
MCP-coincide with MP of IR/cassette
Chin is raised
Establish the RP at T7
Avoid body rotation
Lateral projection (Upright-Standing) IR
14X17-placed in VGD/VCH-longitudinal with MP-coincide with MCP-level of T7
Upper edge of IR is approx. 1 1⁄2 -2” from shoulder level
CRD- Perpendicular-at 72”- distance- towards- MCP- at T7-exits at–MP- of IR
To demo the lateral image of the lungs
Lateral projection (Upright-Standing)
Demos the heart, aorta, left sided pulmonary lesions
Lateral projection (Upright-Standing)
L lateral position
Demos right sided pulmonary lesions
Lateral projection (Upright-Standing)
R lateral position
Demonstrate interlobar fissures, differentiate lobes, and anterior/ posterior location of tumor
Lateral projection
Lateral projection (Upright-Standing)
- Use (1) to support weak patients
- Avoid patient to (2), it will distort the lung image
- Use (3) for demonstration of heart
- For (4), same principle is applied in PA projection
- The procedure can be done in (5) or (6) position
- IV stand
- lean
- left lateral position
- cardiac studies
- seating
- recumbent
Lateral projection (Recumbent Position) Pt Position
Patient to assume either L/R lateral position on top of RT
Lateral projection (Recumbent Position) Comfort Position
Both UE raised, flexed at elbows and FA (forearm) placed against the head
Both LE flexed at knees with sandbag/pillow placed in between knees and ankles for support
Lateral projection (Recumbent Position) Part Position
Thorax in lateral position
MCP-coincide with MP of IR
RP at level of T7
Avoid body rotation
Lateral projection (Recumbent Position) IR size/placement
14X17-placed inside the BD (BuckyDiaphragm/ tray)-longitudinal with MP-coincide with RP
Upper edge of IR approx. 1 1⁄2 -2” from shoulder level
CRD: Perpendicular- 72”-SID-MCP-level-T7-exit at MP of IR
PA Oblique Projection Pt Position
Stand infront-VGD/VCH-anterior thorax dependent
Adjusted either in RAO/LAO position
PA Oblique Projection Comfort Position
Dependent UE flex-elbow-dorsum of hand-in contact with hip
Opposite UE raised-grasp the top edge of VGD
Both LE extended-wt. distributed equally
PA Oblique Projection Part Position
Body obliquity-approx. 45 degrees
Midline-body-coincide-MP-IR
RP-T7
Chin is raised
PA Oblique Projection IR size/placement
14x17-VGD/VCH-longitudinal-MP-coincide-RP
Top edge of IR- 1 1⁄2 -2”-from shoulder level
CRD: Perpendicular-72” SID-midline-body-level-T7-exit-MP-IR
To demo the oblique image of the heart and lungs
PA Oblique Projection
- R lung field (side farther from the IR) is demonstrated
- Trachea and carina and the entire R branch of the bronchial tree
- heart, descending aorta and arch of the aorta
PA Oblique Projection
LAO Position
- L lung field (side farther from the l R) is demonstrated
- Rrachea and entire L branch of the bronchial tree
PA Oblique Projection
RAO Position
Gives the best image of the:
- L atrium
- Anterior portion of the apex of the LV
- R retrocardiac space
PAO Projection
RAO Position
PA Oblique Projection
- For cardiac studies- body obliquity is (1) degrees
- Can be done in (2)
- 55-60
- recumbent
AP Oblique Projection Pt Position
Stand infront-VGD/VCH-posterior thorax dependent
Adjusted either in RPO/LPO position
AP Oblique Projection Comfort position
Dependent UE-raised- flex at elbow- hand-in contact with the head
Opposite UE flexed at elbows-dorsum of hand-in contact with hip
Both LE extended-wt. distributed equally
AP Oblique Projection Part position
Body obliquity-approx. 45 degrees
Midline of body-coincide with MP of IR
RP-T7
Chin is raised
AP Oblique Projection IR size/placement
14X17-placed in the VGD/VCH-longitudinal-MP-coincide with-RP
Top edge of IR- 1 1⁄2 -2”-from shoulder level
CRD: Perpendicular-72” SID-midline of the body-level-T7 (3” below jugular notch)-exit-MP-IR
Elevated side usually appear shorter because of magnification of the diaphragm
Heart and great vessels also cast magnified shadows as a result of being farther from the IR
AP Oblique Projection
AP Oblique Projection
The side of interest in APO is usually the (1) side
- can be done in (2)
- dependent
- recumbent
RPO position corresponds with LAO position while LPO position corresponds with RAO position
AP Oblique Projection
This projection is done if the patient is too ill to be positioned in upright
AP Projection
AP Projection Pt Position
Supine on top of RT
AP Projection Comfort Position
Both UE extended-abducted-hands pronated
Both LE extended-sandbag placed under ankles for support
AP Projection Part position
MSP-coincide with midline of RT/coincide with MP of IR
Shoulders on same transverse plane
RP-T7
AP Projection IR size/placement
14X17-inside BD-longitudinal-MP-coincide-MSP-level of T7
CRD: Perpendicular-72”SID-MSP-level of T7 (3” below jugular notch)-exit at MP of IR
- Heart and great vessels are magnified and engorged
- Lung fields appear shorter due to abdominal compression
- Clavicles are projected higher
- Ribs in horizontal appearance
AP Projection
Used to free the basal part of the lungs from superimpositions
Resnick recommendation- AP axial projection
This projection also differentiates middle lobe and lingular processes from lower lobe disease
Resnick recommendation- AP axial projection
Resnick recommendation- AP axial projection CRD
30 degrees caudal- 40”SID-MSP-level of midsternal region
DEMONSTRATION OF AIR-FLUID LEVEL IN THE LUNGS
AP/PA PROJECTION: Right/Left lateral decubitus position
LATERAL PROJECTION: Ventral/Dorsal decubitus position
AP/PA PROJECTION: R/L lateral decubitus position
Pt position
Right/Left lateral decubitus position-top-RT
AP/PA PROJECTION: R/L lateral decubitus position
Comfort position
Both UE raised, flexed at elbows and FA (forearm) placed against the head
Both LE flexed at knees with sandbag/pillow placed in between knees and ankles for support
AP/PA PROJECTION: R/L lateral decubitus position
Part position
Thorax in lateral position
MCP-perpendicular with RT
MSP-coincide with MP of IR/cassette
RP at level of T7
Avoid body rotation
Radiolucent support (2-3” thick) placed under the dependent side to elevate
AP/PA PROJECTION: R/L lateral decubitus position
IR size/placement
14X17-placed-top-RT-vertical-in contact with either posterior/ anterior surface of the body-longitudinal with MP-coincide with RP; back part supported
Upper edge of IR approx. 1 1⁄2 -2” from shoulder level
CRD: Horizontal- 72”-SID-MCP-level-T7-exit at MP of IR for AP and 3” below jugular notch for PA
To demo change in position of fluid and free air in the pleural cavity
AP/PA PROJECTION: R/L lateral decubitus position
AP/PA PROJECTION: R/L lateral decubitus position
- Wait for (1) before making an exposure to allow the fluid to settle down and for air to rise
- For fluid level- place the part of interest (2)
- For air level- place the part of interest (3)
- 5 minutes
- dependent
- elevated
LATERAL PROJECTION: Ventral/Dorsal decubitus position
Patient position
Supine/prone on top of RT
LATERAL PROJECTION: Ventral/Dorsal decubitus position
Comfort position
Both UE extended upward-hands placed over the head
Both LE extended-sandbag placed under ankles for support
LATERAL PROJECTION: Ventral/Dorsal decubitus position
Part position
MSP-perpendicular with RT
MCP-coincide with MP of IR
Shoulders on same transverse plane
RP-T7
Radiolucent support (2-3”) thick-placed under the thorax to elevate
LATERAL PROJECTION: Ventral/Dorsal decubitus position
IR size/placement
14X17-placed on top of RT-vertical-longitudinal-MP-coincide-MCP-level of T7
Back part-supported
CRD:
- Horizontal-72”SID-MCP-level of T7 (for ventral decubitus)-exit at MP of IR
- Horizontal-72”SID-MCP-level of 3-4” below jugular notch (for dorsal decubitus)-exit at MP of IR
To demo. change in the position of fluid and reveals pulmonary area that are obscured by the fluid
LATERAL PROJECTION: Ventral/Dorsal decubitus
position
LATERAL PROJECTION: Ventral/Dorsal decubitus position
Wait for (1) before making an exposure to allow the fluid to settle down and for air to rise
- 5 minutes