Orthogonal-pair (AP + Lateral) portal-to-DRR matching. All current cases live here.
☰
CBCT
Cone-beam CT volumetric registration in three planes (axial, coronal, sagittal) with 6DOF couch correction.
Guide
?
How to use
New here? A 2-minute visual tour of both workflows — the gestures, the views and the match.
Training simulator — educational use only. Not for clinical decision-making. All patient offsets and values shown are fictional.
RT Image Match
CBCTCASE:
PTV
GTV
Brain
Prostate
Bladder
Rectum
Seminal Ves.
Lung
Heart
Lumpectomy cavity
CTV boost
Clips + 5 mm
Surgical clips
Target vertebra
Spinal cord
Esophagus
Aorta
Body
Isocenter
Couch Correction
Vrt
0.00
cm
Lng
0.00
cm
Lat
0.00
cm
Pitch
0.0
°
Roll
0.0
°
Yaw
0.0
°
—
Vrt
—
Lng
—
Lat
—
Pitch
—
Roll
—
Yaw
Fuse all three planes to the reference
LEVEL
50
WIDTH
400
PRESET WINDOW
Bone
Abdomen
Lung
Cerebellum
STRUCTURES
PTV
GTV
Brain
Prostate
Bladder
Rectum
Seminal Ves.
Lung
Heart
Lumpectomy cavity
CTV boost
Clips + 5 mm
Surgical clips
Target vertebra
Spinal cord
Esophagus
Aorta
Body
Isocenter
3D · PLANNING CT
Loading volume…
drag = rotate · wheel = zoom
A
P
R
L
AXIAL
0100
100%
S
I
R
L
CORONAL
0100
100%
S
I
A
P
SAGITTAL
0100
100%
RT Image Match
2D / 2DCASE:
−
◎
+
⛶
100%
AP / PA
S
I
R
L
0%100%
CON100%
−
◎
+
⛶
100%
LATERAL
S
I
P
A
0%100%
CON100%
Translation & Rotation
Vrt
0.00
cm
Lng
0.00
cm
Lat
0.00
cm
RTN
0.0
°
Pitch
0.0
°
—
Vrt
—
Lng
—
Lat
—
RTN
—
Pitch
Match both views to the reference
❮SHIFTS
// HOW TO USE
Match the moving image to the reference, then read off the couch shift.
A hidden 3D setup error is applied to today's image. Your job: slide and spin it until it lines up with the plan, then Check Match reads out the couch correction.
Cyan = reference — the planning DRR / CT (where things should be).
Orange = moving — today's portal / CBCT (what you are adjusting).
Two workflows: 2D/2D uses an AP + Lateral pair; CBCT uses three planes.
Between the views, all six axes are covered — align every view.
Finish with Check Match; green numbers mean you're within tolerance.
1
Select a view click it → gold outline
→
2
Drag or arrow-key onto the reference
→
3
Check Match read the shift
Click a view to select it (gold outline); arrow keys then nudge it 0.5 mm (finer as you zoom).
Drag inside the red ring = move; drag outside = rotate (roll on AP, pitch on lateral).
Hold 1/2/3 + drag to lock one couch axis — 1 A‑P (drag ↕), 2 S‑I (drag ↕), 3 L‑R (drag ↔). Works from either view.
Each view has its own blend slider — fade cyan reference ↔ orange portal.
Tap Ctrl+A to flip the slider and flicker the two images so misalignment pops.
C Color Wash (aligned anatomy → white) · S Spyglass lens.
1
Select a pane click it → gold outline
→
2
Align bone in all three planes
→
3
Check Match 1 cm / 0.5°
A 6DOF setup error offsets the CBCT from the planning CT.
Drag inside a pane = move the CBCT; Shift+drag = rotate. (Blend toward 100% to see it.)