the syrma project for clinical mammography @ elettra ......the syrma project for clinical...
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![Page 1: The SYRMA project for clinical mammography @ Elettra ......The SYRMA project for clinical mammography @ Elettra Safety, Control and Supervision systems A. Abrami, V. Chenda, K. Casarin,](https://reader033.vdocuments.us/reader033/viewer/2022042204/5ea59fa6108de1156c1d3db9/html5/thumbnails/1.jpg)
The SYRMA project for clinical mammography
@ Elettra
Safety, Control and Supervision systems
A. Abrami, V. Chenda,
K. Casarin, D. Dreossi, E. Quai, G. Tromba, A. Vascotto
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Outline
Mammography @ Elettra
Beamline layout & equipments
Safety, Control & SupervisionProject criteriaDirectives, legislationSafety approach & guidelinesExisting & new systems, and their technologies
Conclusions and perspectives
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Mammography @ Elettra The SYRMA Project
(SYnchrotronRadiation for Mammography) Agreement among the Public Hospital of Trieste, the University of Trieste and Elettra
Aim
In vivo mammographic studies
on selected number of cases picked out by radiologists
Target
Patients with dense breasts,
conventional radiographs with uncertain diagnosis
Set-ups
I phase: PHC planar radiography with conventional screen-film system
II phase: use of digital detectors
Clinical trial started on March 13, 2006.
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Beamline layout & equipments
Be : Berillium windowM : MonochromatorAl : Aluminium filtersPb : Lead shieldings
SYRMEP layout
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Beamline layout & equipmentsSYRMA layout
FS : beam maskHS : horizontal slitsiC1,2 : ionization chamberS1, : safety shutter S2,3 : imaging shutter
P : dressing roomPI : laser pointers St : stairsCP : breast compressor
L: laser scannerB : patient support (bed)D : detectorRS : film light boardRM : rate monitor
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Beamline layout & equipments
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Beamline layout & equipments
Safety Shutter
Shutters
Ionization Chambers
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Beamline layout & equipments
Film Screen System
Patient Support
Breast
Compressor
Bed Positioning Keypad
Dressing RoomPatient Support
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Project criteria
Split into decoupled systems
System Functions identification
System safety grade identification
System integration without decoupled
functionalities disservice
Minimizing exam execution time
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Project criteria (2)
Syrma Controls
Requirements Specification
Qualified Expert
&
Radioprotection
Technical specifications
&
legislation
Meetings
“Brainstorming”
Validation
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Directives & Legislation
Standards are mainly intended to be used by manufacturers whoassemble and offer for sale a combination of electrical and medicalequipment…
… this is NOT our case,
but standards force the designer to guarantee a reasonable safetylevel
So we tried to design and assemble our systems
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Directives & Legislation
EN 1050
Safety of machinery. Principles for risk assessment
CEI 62-5
Medical electrical equipment
CEI 64-4
Electrical installations in locations used for medical practice
EN 418
Emergency Stop Equipment
EN 964-1
Safety of machinery. Safety related parts of control systems
EN 349
Safety of machinery. Minimum gaps to avoid crushing of parts of the human body
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Safety approach
It is essential the risk evaluation (EN1050) in
projecting a machinary and the choice of its
security category (EN954-1).
Security Category
Start
S = accident seriousness
F = attendance of presence
near the machinery
P = prevention chance
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Safety approach
It is essential the risk evaluation (EN1050) in
projecting a machinary and the choice of its
security category (EN954-1).
Security Category
Start
S = accident seriousness
F = attendance of presence
near the machinery
P = prevention chance
CATEGORY 3 CATEGORY 4
SINGLE FAULTDoes NOT lead to loss of a
safety function
Does NOT lead to loss of a
safety function
Should be detected at or
before the next demand for
safety function.
Should be detected at or
before the next demand for
safety function.
ALL FAULTSDo not require to be
detected.Will be detected.
Accumulation of faults
could lead to hazardous
situation.
There will the protection
against accumulation.
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Safety guidelines
Decoupled systems with suitable safety grade
Redundancy and technological diversity in
(sub-)systems with high safety level
Verification and validation performed by
external & indipendent specialists
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SupervisionAccess
Dose
Safety guidelines (2)
Safety level
Priority level
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Existing Systems
Beamline Control System
Beamline Access Control
Siemens Simatic-S115U PLC
VME Cpu & “traditional” I/OWeb graphic interface
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Existing Systems
Beamline Control System
Beamline Access Control
Siemens Simatic-S115U PLC
VME Cpu & “traditional” I/OWeb graphic interface
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Systems
Bed-film
Breast Compressor
Access and Dose Control
Machinery Safety
Supervision and human-machine
graphic interface
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Bed-film System
Beam
BedFilm holder
4 high-performance diodes
optimized for X-rays
Ex
po
sim
eter
s
Laminar beam * vertical scan = area image
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Bed-film System (2)
Rotation :exam projection(top-to-bottom view and oblique side view)
Vertical scan : exam
Horizontal positioning :alignmentexam
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Bed-film System (3)
Saskatoon, 10th June 2008
Breast Compressor is fixed respect to patient support that can rotate!!!
Support Hole axis
BeamBreast Compressor
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Bed-film System (3)
Saskatoon, 10th June 2008
So an adequate (DIN EN 954-1,03/97, Category 4 ) interlock toavoid bed moving while breast iscompressed is needed.
Support Hole axis
BeamBreast Compressor
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Bed-film System (5)
S
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Bed-film System (5)
S
Function: Compression - Motion Interlock
Safety device: PNOZ X2 PILZ
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Bed-film Technologies
SMotion Control: PLC
Motorola MC68360AWL, Forth & Assembler
Compression - Motion Interlock
EstopSafety device:
PNOZ X2 PILZ
Cat. 4
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Breast Compressor
S
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Breast Compressor
S
Manual paddle
Motorizedpaddle
max 200 N
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Breast Compressor (2)
Beam
2 “Close” Limit
switches
2 “Close” Limit
switches
2 “Open” Limit
switches & 1 Breast
presence switch
Motor
Hall Sensor
Potentiometer Encoder
Release
switch
Control
Motorized paddle Manual paddle
2 “Open” Limit
switches
Magnetic brake
Pedal #1
Pedal #2
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Breast Compressor (2)
Beam
2 “Close” Limit
switches
2 “Close” Limit
switches
2 “Open” Limit
switches & 1 Breast
presence switch
Motor
Hall Sensor
Potentiometer Encoder
Release
switch
Control
Motorized paddle Manual paddle
2 “Open” Limit
switches
Magnetic brake
Pedal #1
Pedal #2
max 200 N1. Motor current limitation
(directly on hardware)
2. Paddle release (brake)
after “hall sensor”
readout (Plc program)
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Breast Compressor Technologies
SControl: PLC
Modular I/O SystemIEC programming languages:
IL, ST, SFC, FBD, LD, CFCIL: Instruction List ST: Structured TextSFC: Sequential Function Chart FBD: Function Block DiagramLD: Ladder DiagramCFC: Continuous Function Chart Editor
HW SW Compression threshold
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Access & Dose Control
S
• It is possible to work on the
beamline in two different
ways:
- Experimental Mode
- Patient Mode
Experimental
“hutch”
Radiologist
Room
Patient
Room Experimental Hutch: B.A.C.S.
Experimental Hutch: traditional Beamline Access Control System (B.A.C.S.)
Patient Room: customizedaccess control system topatient room (P.A.C.S.)
Patient Room: (P.A.C.S.)
Exams:Dose Control
During exams:
Dose Control
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P.A.C.S. Technologies
Pilz
PSS3000
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P.A.C.S. Technologies
Pilz
PSS3000
Cat. 4
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P.A.C.S. Technologies
Pilz
PSS3000
Cat. 4
S5
Search EM
S6
Key C blocked
S0
Key B extracted
S1
Key B inserted
S2
Key C unblocked
S3
Door open EM
S4
Door closed EM
S7
Emergency EMExperiment Mode
S14
Door closed, room not
checked
S15
Search PM
S16
Search with
door open
S13
Door open PM
S10
Door closed, room
checked
S17
Emergency PM
S18
Reset Emergency
PM
IS
Initial State
Patient Mode
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Dose Control Technologies
Pilz
PSS3000
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Dose Control Technologies
Pilz
PSS3000
sensors and actuators aquired from PLC are
redundant and have been choosen with
different technology
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Dose Control Technologies
Pilz
PSS3000
sensors and actuators aquired from PLC are
redundant and have been choosen with
different technology
Magnetostrictive sensor
Potentiometric sensor
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Machinery Safety
A
B
C
Crushing danger against wall
Patient fall danger
European Standard EN349 is applicable to risks from crushing hazards
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Machinery Safety Technologies
In order to fullfill the safety
requirements, some devices to
avoid dangerous movements
are needed.
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Machinery Safety Technologies
In order to fullfill the safety
requirements, some devices to
avoid dangerous movements
are needed.
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Supervision & Human-Machine I/FS.H.M.I.
Bed-film System Breast Compressor System
Access & Dose Control System
Ionization Chamber System
Beamline Control System
Ancillary Systems (i.e.: Environmental Data,…)
SHMI
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Supervision & Human-Machine I/FS.H.M.I.
Bed-film System Breast Compressor System
Access & Dose Control System
Ionization Chamber System
Beamline Control System
Ancillary Systems (i.e.: Environmental Data,…)
SHMI
•Functions:
Control all systems to:
Insert initialisation/calibration data
Register patient data
Select the X-ray energy and optimize the beam
Verify the congruency of all the examination parameters
Manage the pre-scan
Carry out the scan
Register dose report
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S.H.M.I. Technologies
- hw: •19” rack PC•Pentium 4 1.8GHz•controller raid Adaptec 2400
- sw: •linux debian 3.1r0a “sarge”•C, gtk & glade
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S.H.M.I. Technologies
- hw: •19” rack PC•Pentium 4 1.8GHz•controller raid Adaptec 2400
- sw: •linux debian 3.1r0a “sarge”•C, gtk & glade
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S.H.M.I. Technologies
- hw: •19” rack PC•Pentium 4 1.8GHz•controller raid Adaptec 2400
- sw: •linux debian 3.1r0a “sarge”•C, gtk & glade
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S.H.M.I. Technologies
- hw: •19” rack PC•Pentium 4 1.8GHz•controller raid Adaptec 2400
- sw: •linux debian 3.1r0a “sarge”•C, gtk & glade
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Conclusions and perspectives
After 3 years in operation:
Systems have shown high reliability and efficiency
Minor changes have been asked & done
without drawbacks
What next?:
Integration of digital detectors
Realization of tomosyntesis/tomography
![Page 49: The SYRMA project for clinical mammography @ Elettra ......The SYRMA project for clinical mammography @ Elettra Safety, Control and Supervision systems A. Abrami, V. Chenda, K. Casarin,](https://reader033.vdocuments.us/reader033/viewer/2022042204/5ea59fa6108de1156c1d3db9/html5/thumbnails/49.jpg)
SYRMA CollaborationA.Abrami, K.Casarin, V.Chenda, D.Dreossi, R.H. Menk, E.Quai,
G. Tromba, A.Vascotto
Elettra, Sincrotrone Trieste
F.Arfelli, E.Castelli, R.Longo, T.Rokvic
Department of Physics & INFN
University of Trieste
M.A. Cova, E. Quaia, M. Tonutti, F. Zanconati
Department of Radiology
University and Hospital, Trieste
P. Bregant, F. de Guarrini
Health Physics - Hospital, Trieste
![Page 50: The SYRMA project for clinical mammography @ Elettra ......The SYRMA project for clinical mammography @ Elettra Safety, Control and Supervision systems A. Abrami, V. Chenda, K. Casarin,](https://reader033.vdocuments.us/reader033/viewer/2022042204/5ea59fa6108de1156c1d3db9/html5/thumbnails/50.jpg)
SYRMA CollaborationA.Abrami, K.Casarin, V.Chenda, D.Dreossi, R.H. Menk, E.Quai,
G. Tromba, A.Vascotto
Elettra, Sincrotrone Trieste
F.Arfelli, E.Castelli, R.Longo, T.Rokvic
Department of Physics & INFN
University of Trieste
M.A. Cova, E. Quaia, M. Tonutti, F. Zanconati
Department of Radiology
University and Hospital, Trieste
P. Bregant, F. de Guarrini
Health Physics - Hospital, Trieste
Thanks foryour kind attention