Chest, Sternum, Ribs and Abdomen Flashcards
Why are Upright done in a chest?
- Allows diaphragm to reach the lowest position
- Allows for demonstration of FREE air/fluid levels in pleural cavity
If Proper inspiration for chest what is visualize?
Demonstrate 10 posterior Ribs above diaphragm
S.I.D for chest? And why?
72”, minimizes magnification of the heart shadow/image
(Chest) High kVP 110-125, why?
Creates low radiographic contrast
(Chest) High mA, short time, why?
Minimizes heart motion and adequate density
Good penetration in a chest?
Faint visualization of thoracic spine through shadow of heart
Grid is used for?
Typically used to absorb scatter radiation
Proper IR placement and anatomical markers
Patient Prep for chest
- Everything off from waist up
- Gown open to the back
- Remove all artifacts
- Collimate the beam-reduce patient dose and improve quality of radiograph
Routine Chest Views
- Posteroanterior - Upright Anterior
- Left lateral projection- Upright left lateral
Landmarks for chest?
- T7- Inferior angle of scapula (PA)
- 7”-8” below C7 (Lateral)
- 4” inferior to the jugular notch (AP)
Size of Bucky, S.I.D for PA Chest
14x17- Vertical Bucky - 72” S.I.D
Position for PA chest?
Upright anterior position
Midpoint of IR centered to T7
Top cassette about 1.5-2” above shoulders if place lengthwise
Chest is
MSP centered to IR
Roll shoulders forward and depress
Draw scapula’s out laterally away from the lungs
Lift head slightly up why?
Move chin out of the way from chest
Central Ray for a PA chest?
Perpendicular to T7 at MSP
Respiration for PA chest?
Double inspiration, exposure at 2nd inspiration
Structures seen in a PA chest?
Heart, Lung, and mediastinum. No rotation of the sternoclavicular joints
Position of Lateral chest?
Upright left lateral position
Size of Bucky, S.I.D for lateral chest?
14x17- Vertical Bucky- 72” SID
Center thorax?
To middle of IR
Left lateral Chest
Is MSP parallel, MCP perpendicular
Extend chin up slightly
Move chin out of the way
Central Ray for left lateral chest?
Perpendicular to T7 at MCP
Respiration for left lateral chest
Double inspiration, exposure at 2nd inspiration
Structures seen in left lateral chest?
Superimposition of the posterior ribs, indicating no rotation
Hilum (Root)
Is a depressed surface at the center of the medial surface of the lung. It is the point at which various structures enter and exit the long
Size & S.I.D Lateral Decubitus Position
14x17 - Grid - 72” SID
Recumbent position, lying on side of interest
RLD or LLD position
(lateral decubitus position) no rotation raise patient approx. 2-3 inches with decub sponge
Patient on side, arms above head, flex knees and superimpose (help with rotation)
Lateral decubitus IR?
Approx. 2” beyond shoulders, cassette or IR lengthwise only
Central ray for Lateral decubitus?
horizontal and perpendicular to T7 at MSP
Lateral decubitus respiration
Exposure after 2nd inspiration, extend chin up slightly
What is visualized in a lateral decubitus?
Any FREE fluid present in the pleural space will be demonstrated on the dependent chest wall
Size & S.I.D Lordotic position?
14x17 - Grid- 72” SID
Lordotic standing position?
Upright posterior, approx. 8”-12” away from the vertical Bucky (lean back)
Positioning a lordotic
Center patient in middle of IR to midsternum
Central Ray for lordotic
Perpendicular to MSP at midsternum, or Tube angled 15-30 degrees cephalon with the patient upright
Respiration for lordotic
Exposure after 2nd inspiration
What is visualize in a lordotic X-ray?
Apices of both lungs, free of superimposition by the clavicles
Situs Inversus
All internal organs are on the opposite side, note heart and air in stomach on patient’s Right side
Size & SID AP RIB UPPER
14x17 - Bucky- 40” SID
Upright or Recumbent position
(AP Rib Upper) Coronal plane is parallel to IR
Upper margin of IR is 1.5-2” above level of spinous process of C-7
Central Ray for AP Rib Upper?
C.R. Perpendicular IR. Center of midclavicular line at approx. level of axillary fold
What is visualizable in a AP upper rib?
Ribs 1-10 visualized. Posterior ribs best visualized
Size & SID AP Oblique Upper Rib
14x17 - Bucky - 40”SID
RPO or LPO Position
(AP Oblique Upper Rib) Conronal plane is 45 degrees to IR
Upper margin of IR is 1.5-2” above level of spinous process of C7
Central ray AP oblique upper rib?
C.R. Perpendicular IR. Center of midline of anterior surface at approx. Level of axillary fold
AP oblique upper rib respiration?
Exposure after inspiration- no motion (upper)
What is visualized in the AP oblique upper rib?
Ribs 1-10 visualized. Axillary portions are best seen.
RPO- Right axillary ribs
LPO- Left axillary ribs
Size & SID PA upper Rib
14x17 - Bucky - 40”SID
Prone or Upright Anterior Position
(PA upper Rib) Coronal plane is parallel to IR
Upper margin of IR is 1.5-2” above level of spinous process of C7
Central ray for PA upper Rib?
C.R perpendicular IR. Center of midclavicular line at approx. level of axillary fold
Respiration for PA upper Ribs?
Exposure after inspiration- no motion (upper)
What is visualized in PA upper Rib?
Ribs 1-10 visualized. Anterior ribs best visualized
Size & SID PA Oblique upper Rib
14x17 - Bucky - 40” SID
RAO or LAO position
(PA oblique upper rib) Coronal plane is 45 degrees to IR
Upper margin of IR is 1.5-2” above level of spinous process of C7
Central Ray for PA oblique upper Rib?
C.R. Perpendicular IR. Center of midline of posterior surface midway between spine and midaxillary line of affected side of approx. level of axillary fold
Respiration of PA oblique upper rib?
Exposure after inspiration- no motion (upper)
What is visualized in PA oblique upper rib?
Ribs 1-10 visualized. Axillary portions are best seen.
LAO- Right axillary rib
RAO-Left axillary rib
Size & SID AP Lower Posterior Ribs
14x17- Bucky - 40”SID
(AP lower ribs) coronal plane is parallel to IR
Lower margin of IR is at level of iliac crest
Central Ray AP lower ribs?
C.R. Perpendicular IR. Center of midclavicular line at approx. level of tip of xiphoid process
Respiration for AP lower Ribs?
Expiration-no motion
AP lower ribs best visualized?
Ribs 8-12, posterior ribs are best visualized
Size & SID AP Oblique lower ribs?
14x17 - Bucky - 40” SID
RPO or LPO
(AP Oblique lower ribs) Coronal plane is 45 degrees to IR
Lower margin ofIR is at level of iliac crest
Central ray AP Oblique lower ribs
C.R. Perpendicular IR. Center of midline of anterior surface at approx. level of xiphoid process
Respiration AP Oblique lower ribs
Expiration- no motion
What is best visualized in AP Oblique lower ribs?
Ribs 8-12 visualized. Axillary portions are best been
RPO- right axillary Ribs
LPO- left axillary Ribs
AP abdomen a.k.a
KUB (kidney, Ureters, Bladder)
what do ways can a KUB be performed?
Upright and Supine
Upright/decubitus abdomen
Demonstrate air-fluid levels in intestines and to visualize free intraperitoneal air, if present.
Why do we have to wait several minutes to perform an upright KUB
Demonstrate true results
Why do we have to wait several minutes to perform an upright KUB
Demonstrate true results
Why do we have to wait several minutes to perform an lateral abdomen?
Demonstrate abdominal aorta and foreign bodies in GI tract
KUB shield
May shield male patient with gonad shield if requested
Shield both genders with upright exam of abdomen if requested
Prep for Abdomen
Remove everything except underpants, shoes and socks
Gown open to the back, you may need two if Hypersthenic body habitus
Technical prep for Abdomen
- KVP- Sthenic 70-80kVp, long scale of contrast
- mAs- short enough exposure time to decrease motion(s)
- Sufficient density (mA) or brightness
Involuntary motion (peristalasis) (abd)
Patient can not control, Appear as a localized haze in bowels
Voluntary motion (Abd)
Patient CAN control
PREVENT BY:
1. Prep of breathing instructions
2. Patient comfort
3. Pause after expiration before exposure
Quietly of x-ray, or what we need to see an a x-ray abdomen
- Psoas muscle
- Lower border of liver
- Kidney shadows Right and left
- Transverse process of lumbar spine
Abdomen x-ray ways?
- Three way- abdomen acute series KUB(supine), upright abdomen, and PA CXR
- Two way- Abdomen 2 view KUB (supine) and upright
Size & SID for AP abdomen
14x17, LW 40” SID
Position: Supine
(AP abd) MSP perpendicular to table and centered to IR
IR centered at height of iliac crest
Central Ray AP ABD
C.R: iliac crest down MSP
Respiration for AP ABD
Expiration
Pubic Symphysis
Must be at the bottom of the IR.
If pubic symphysis missing?
Perform “bladder shot” collimate 10x12 CW.
CR: perpendicular 2” above symphysis, down MSP
Rotation determined by spinous process are center equally
Size & SID AP Upright ABD
14x17, LW 40” SID
Position Upright posterior
IR for upright abd
MSP perpendicular to wall Bucky
Central ray upright abd?
C.R. Perpendicular 2” above iliac crest, down MSP
Respiration for upright abd
Expiration
Image: distention of bowel, free air on right side and air fluid line
remember to perform first. This allows a true reflection of air-fluids levels if any present
Diaphragm must be present?
On top of image for a upright
Left lateral decubitus abd
Performed when patient cannot stand for upright
Left later decubitus abd
Always perform left side down= LLD
Why it needs to be left lateral decubitus abd, and not right
Any amount of free air could be better seen outlined against the lower margin of the liver than it could against any organ on the left side (stomach)
Size & SID left lateral decubitus abd
14x17, 40” SID, Grid or VB
IR LW to patient (LLD abd)
CW in IR
Position: LLD
Patient elevated on sponge
Central Ray left lateral decubitus abd
C.R perpendicular and horizontal 2” above iliac crest, down MSP
LLD abd IR
MSP perpendicular to IR and horizontal
Respiration for LLD abd
Expiration
Decubitus and/ or Upright abd
*horizontal x-ray beam is necessary to demonstrate air fluid levels
Sternum
Size & SID position
10x12, LW 40” SID for RAO
10x12, LW 72” SID for Lateral
Typical position for sternum
Upright RAO and Lateral
What kind of kVp for sternum?
Low kVp
Respiration for Sternum
Inspiration
Oblique for sternum, degree?
15-20 degrees
Bony thorax most common reason for x-ray?
Trauma
Nontraumatic (bony thorax)
Usually malignant bone disease
Multiple myeloma/ metastatic bone lesions
Atelectasis
Lung collapse
Pneumothorax
Air in pleural cavity
Always shows atelectasis
Pneumonia
Inflammation of the lungs by bacteria or viral infection
Emphysema
Chronic lung condition (COPD-Barrel-chested)..obstruction and destruction of the small airways and alveoli of the lungs (causes over inflation)
Tuberculosis (TB)
Infections lungs disease. Primary screening test for TB done with skin test.
Pneumoconiosis
Group of chronic occupational lung disease caused by inhalation of irritating dust (asbestos)
Congestive heart failure
Advanced cardiac insufficiency with pulmonary edema
Pleural effusion
Collection of fluid in the pleural space
Returned hollow viscus
Opening between the gastrointestinal tract and the peritoneal cavity
Peritonitis
Inflammation in the peritoneal cavity
Ascites
Accumulation of fluid in the peritoneal cavity
Other chest images
- Decubitus position
- Oblique position
- Lordotic position
- Right lateral
- Supine position
- Images with nipple markers
(Ribs) best visualized
Ribs closest to the IR
Respiration Upper ribs
Inspiration (diaphragm low)
Respiration lower ribs
Expiration (diaphragm high)
Oblique posterior positions
Same side oblique…clinical side of interest closest to the IR
RPO-right
LPO-Left
Oblique anterior positions (ribs)
Clinical side of interest FARTHER away from IR
RAO-Left
LAO-right