Tech Training Flashcards
Power output during HIFU P/F
P = 3 mhz P= 200w
Transducer used to focus ultrasound, causing ablation of bio tissue
3 mhzx HIFU transudcer
What is the size of the energy field, during the firing phase
1.7 diameter 5 long
THe screen that displays the US imaging and performs the fusion from the DX imagw
Imaging Screen
Used to plan and control HIFU procedure in real time
Control Screen
How many concentric rings are on the prob
16
What componet delivers the ultrasound energy from the probe
Electronic Dynamic Focusing and 16 Rings
This transducer provides US imaging
7,5 mhz transducer
How many transducers are on the endorectal probe
2
What componet performs the HIFU procedure by delivering targeted US energy to specific target area
Endorectal probe
What is the temperature at the focal point
185 - 203
Important considerations when positioning the probe at the start of the procedure 4
- Angle probe holder anterior/posterior 2. place orange line on the rectal wall 3. Probe is centered in the mid recturm 4 . Facing the target lobe
What will allow for the easiest probe movements
The image aquisition should be as horizontal as possible
What are the 3 features of rectal probe
- Non-invasive, robotic controlled energy2. Confirmational software3. Perserves patient QoL
What are the 3 funcations of the focal pak
- Provides optimal US propogation2. assists in dilating the anus sphincter3. cools down rectum w/ Ablasonic liqui
Describe automatic motor centering
Occurs at start of procedure to test ROI and internal componets
What do yellow lines simulate
Limitis of the ablation zone
What is required to complete a MRI fusion
- T2 sequence2. 3X contours3. ROI Contor
Probe starting position
- Centered in rectum2. Facing the target lobe
Required PC for software
- windows 102. 1366x7663. 15.6 screern4. mouse5. 800 ram6. intel i5 second gen
Allows you to find the synchronization between images in real time and aquisition images
padlock
Indicts similarity between two geometrical points
Hausdorf distance color map
Evaluates the similarity between contoured US volume and fusion result, should be as close to 100 as possible
Dice Coefficicent
Indicates that images are synced
padlock closed
what is syncronization
Occurs when the long/cross planes match perfectly
Fusion can only occure when 4 things are met
- MRI loaded2. MRI prostate contour loaded3. ROI loaded4. US prostate contour loaded
How to zoom on an image
Right click mouse, off of the image
Required imaging sequence
T2
MRI volume is deformed to overlay the images as precise as possible
eleastic fusion
Detects extraprostatic extension and finds suspicious areas
multi-parametic MRI
Term for sweeping the prostate from L to U
Scanning process
Occures when the probe learns the lower limit and returns to upper limit
Selecting aqusistion
Combines diagnostic and us images to better ID target
fusion
Menu that aloows changes to US parameters
Ultrasound Menu
Slice naming convention
Area, Block, slice
Menu with 3 options:1. start new treatement2. review treatments3. exit
main menu
When is patient information deleated from system
after transfer to USV
Occurs when MRI volume undergoes 3D deformation
eleastic fusion
MRI sequence required for Focal One 3
- T22. Diffusion3. Perfusion
What images are produced by the probe
Transverse
Positoin of the probe
Centered in rectum facing target area
Occures if images aren’t synced
Padlock
How many degrees of freedom
5
How many translational degrees of freedome
3
How many Rotation degrees of freedome
2
What 3 things does the software allow a urologist to do
- input images2. visualize anatomy3. perform elestic fusion
What increments of energy are applied when firing
5 mm increments
How many slices are used at a time for planning
5
THe system will automatically execute plan after
Each 5 slice block is planned
ablation time for single treamtnet
45 minutes
ablation time for hemi
1 hr
Whole gland ablation time
90
What are the two robotic functions
- autonomous in executing plan2. Measures psotion of rectal wall and re-adjusts in real time before firing
What features allows 5 degrees of freedome
robotic positoning system
Increments of energy delivery
5 mm
slice size to ensure full ablation area
1.7
componets of power keypad
- lock/unlock trey2. 2 USB connectors3. Power button4. Emergency stop
Rear panal componets
- equipotential bond2. RJ 45 connector3. Electrical plug
of people recommended to move the system with slope < 2, <10, 10+
124
What are the four controls on the keypad
- Raise probe support2. Lower probe support3. Release all movmeents4. Release only angular movements
used to fill or empty the balloon
clamp
used to perforate injection site on ablasonic pouch
perforator
Connects the tubing to the probe
2 Luer connectors
Focal One Pak includes 5
- balloon2. ligature3. ablasonic fluid4. accoustic gel
24 Volt shutdown and turns off motor card/amplifier/Cooling Unit/Electromagnets
Emergency stop
Verifies that software is active and turns on sub-assemblies
Watch Dog
Location of image transducer
probe
How are images orientated on the screen
Patient R/L is on L/R of screen
Accoustic frequency
7.5
Accoustic Resolution
only one focalized point at 25 mm
MRI accoustic setting
1, 2<1, 2
MRI accoustic measurement uncertainty
15%
Max accoustic power
720 mW/cm
Componet that administers HIFI
Tranducer
How many piezoelectric elements on the probe
16
Mechanical vibrations of therapy transducers generates accoustic waves and pressure in propagnatic medium
HIFU
What makes the US “focused:
Spherical shape of ultrasound
type of energy carried by US waves
High Intensity
Adjustable through the dedicated electronic control system
Focal Point
Between what componets is Ablasonic fluid circulated
Between the probe and cooling unit
Probe location in intermediate vertical position
1m from floor
Connectors equiped with protective cover with locking screws
- Shooting connector2. US probe connector
Connector to the left of inflow with 2 black wires
Inflow Connector
Connector to the right of the inflow with 2 black wires
Luer connector to the cooling unit
Integrated temperature decector
Measures temp of Ablasonic fluid
Where does the Ablasonic fluid enter the balloon
Hole at nose of probe
Placed on tip of probe, on shooting transducer
Balloon placement
Allows the process to continue without loss or defraction
Propogation coefficient
Purpose of Ablasonic Fluid 3
- Control transmission of US waves between the probe and rectum2. Protests rectal mucosa
What 5 axis does the probe move
- long2. transverse3. rotational4. angular5. vertical
How many axis does the probe move along
5
Light that shows system has power
Green
Ensures circulation of cooling fluid
Pump
Which direction does the probe rotate
along the longitudinal axis
Allows the probe to move during the procedure
electromagnets under robotic control
Ensures patient doesnt move during the procedure
Fixed patient movement detector
3 ways to import DX data
- through PACS2. USB3. CD/DVD
Allows diagnostic information to be transposed on the US image
HIFUsion software
Integrated US setting
7.5 mhz
INtegrated in the center of the probe, enables visualization of the prostate
Transverse imaging transducer
Why are shots taken at different focal depths
Allows stacking elementary lesions IOT adjsut height
Focused width Z
6.4
Focalwidth Y
1mm
Focal width on X
0.58
Focal width definition
-6dB
Transducer accoustic dimension
Z
Transducer transverse dimension
Y
Transducter longitudinal dimension
X
Transducer, diameter of central opening
24.8
Transducer truncation
35 mm
Transducer focal distance
60
Transducer diameter
57.5
What allows focaliaation of US waves @ 60mm
Spherical Transducer
Feature enables dynamic scanning in anterioposterior axis of focal point
Dynamic focusing
US emission freq
3 mhz
Createts a desyncronization effect by exciting electrical signals
Transducer coupled w/amp
Equipped with an annular array transducer with 16 concentric rings
Dynamic focusing prove
Maintains controled temperature flow to perserve rectal wall
Ablasonic liquid
Coagulative tissue
Tissue with cell death when blood flow slows or stops
350mm bag w/ hole at the extremes
Ablsonic pouch
3 descriptions of Ablasonic fluid
- Interface between probe and rectum2. Enables proper positioning3. Cool by internal machine
3 Ablasonic features
- optimized forumla with excellent accoustics2. stable3. high cavitation threshold
How much US gel is included
20G
3 purposes of accoustic gel
- lubricant to dilate anus2. facilitates probe insertion3. Improves accoustic interface
Size of syringe in Focal Pak
50 cc
relfects light from patient motion infred sensor
reflector
Flexible tape wound on probe holding balloon
Ligature
Risk of using 3rd party ballon
excessive heat
consumables not included 6
- OPR table2. adhesive bag receptical3. sterile gloves4. non-sterile gloves5 urine cath6. compression socks
Probe installation steps 7
- place in mount without removing covering2. lock probe3. Attach US4. Attached and manage cables5. emergency stop not pressed6. turn on system7. Wait until power light turns green
Green connector, locked by turning clockwise
US model 1
White connector with cables facing up and turned to right to lock
US model 2
5 accessories in Focal Pak
- tubes2.US gel pouch3. balloon4. ligature5. Ablasonic Fluid
Luer connector warm return
female
Luer connector for cold return
Male
When does the probe not move
when 2elementary lesions are in the same global lesion
Moves only in ther axis of accoustic propogation
focal point
Which direction is firing sequence executed
Distal to proximal
Probe is equiped with only _____imaging transducer
transverse
3D reconstruction from of prostate from series of cross-sectional images taken between LL/UP
Purpose of Scanning
How will longitudinal slices be obtained
through 3D reconstruction of prostate from transverse images
Minimum safe distance from apex/LL
2 mm
Probe temperature in firing mode
18-Oct
Indicates that HIFI power is on
Red LED on working table
What combination of 2 phenomenon cause ablation
Focused sound wave that heat tissuecauseing cavitatoin
How many digits make up the error code
6
