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Processi e Software per la Fusione
delle immagini: “Evidence” e
metodologie applicative
Gabriele Guidi
Medical Physics Dpt.
Az.Ospedaliero Universitaria di Modena
+39 059 422 5669
Guidi.Gabriele@policlinico.mo.it
NO CONFLICTS OF INTEREST TO DISCLOSE
Co-Funding:
• Italian Ministry of Health (MoH2010, GR-2010-2318757)
Dose warping methods for IGRT and Adaptive RT: dose accumulation based on organ
motion and anatomical variations of the patients during radiation therapy treatments
• Tecnologie Avanzate S.r.l. (Italy): Co-Partner of MoH2010, GR-2010-2318757
QUANTE E QUALI IMMAGINI………. PER LA FUSIONE…..
US
CT
….DIFFERENZE TRA TEORIA E «EVIDENCE»
«Evidence»……Appropriatezza, efficacia ed efficienza clinica
Teoria, software e algoritmi….. Fisica, Matematica, Biologia, Genetica, Ingegneria…..
RAZIONALE : IMAGING, PROCESSI ED EVIDENZE
Image-Guided Radiation Therapy: A Refresher
D.A. Jaffray, ASTRO 2012
Imaging and cancer: a review;
Leonard Fassa . Molecular Oncology 2 (2008)
QUALI TIPI DI IMMAGINI?
QUALI VANTAGGI E SVANTAGGI?
QUALI PROBLEMATICHE?
QUALI PROCESSI ED EVIDENZE?
PERCHÉ LA FUSIONE?
QUALE ALGORITMO O SOFTWARE ?
(…..dubitate di chi dichiara di avere il migliore……..)
….CORREVA L’ANNO 1998….. E SE NE PARLAVA….
Medical Image Analysis (1998) volume 2, number 1, pp 1–36
A survey of medical image registration
J. B. Antoine Maintz∗ and Max A. Viergever
Image Sciences Institute, Utrecht University Hospital, Utrecht, The Netherlands
MATEMATICAMENTE……… SIETE SICURI DI AVERE UN MIGLIORE?
Medical Dosimetry, vol. 33, no. 2, pp. 149-155, 2008
Multimodality image fusion and planning and dose
Delivery for radiation therapy. Cheng B
ALLINEAMENTO
PERFETTO
ALLINEAMENTO
IMPERFETTO
Robust Image Registration for improved clinical efficiency using local structure analysis
and model-based processing
Daniel Forsberg
MATEMATICAMENTE……… SIETE SICURI DI TROVARE UN MIGLIORE?
Image Fusion
Medical image fusion: A survey of the state of the art
Alex Pappachen James a,⇑, Belur V. Dasarathy b
MATEMATICAMENTE……… SIETE SICURI DI TROVARE SEMPRE LA STESSA SOLUZIONE?
8/24/2015 11
…… PERCHÉ’ UTILIZZIAMO LA FUSIONE?
Mesothelioma
H-N
Lymphoma
Pancreas
Prostate
Radiosurgery
Craniospinal
PRATICA CLINICA … È UNA ROUTINE DI TUTTI I GIORNI
Re-Irradiation
Lung
Total Lymphoid Irradiation
Total Body Irradiation
Lung - SBRT Bilateral BreastMultiple Lesions
1. Per la definizione del volume bersaglio?
2. Perché i trattamenti sono sempre più
conformati?
3. Perché vogliamo fare AdaptiveRT?
4. Perché curiamo il setup del paziente?
5. Perché teniamo conto del movimento?
6. Perché meccanicamente o fisiologicamente
il paziente assume condizioni particolari?
7. ……………
8/24/2015 12
Es. PET FUSION & CT EXHALE & CT INHALE …. PROBLEMI CELATI CHE LA FUSIONE POTREBBE FALSARE O RISOLVERE
4DCT vs. PET
(GTV4D= Red Contour)
4DCT vs CT with Max Inhale
(GTV Max Inhale=Yellow contour)
4DCT vs CT with Max Exhale
(GTV Max Exhale Green Contour)
QUANTE VARIABILI DI ERRORE E/O CO-REGISTRAZIONE ERRATA……..”EVIDENCE”
(ES. ARTEFATTI DA MOVIMENTO, PROTESI, VARIAZIONI DOSIMETRICHE DA RESPIRO, LEMBI CHIRURGICI ESPIANTATI)
Anatomy-Pathology
exam before formalin
Anatomy-Pathology
exam after formalin
……….FORSE UN ERRORE CONCETTUALE……………?
(LAVORARE IN 4D NECESSITA DI CONCETTI 4D…. LA FUSIONE È UNA COSA DIVERSA)
4DCT (Fase Specifica) 4DCT (Fusione)
8/24/2015 15
LA MATEMATICA E FISICA COMPLESSA CI AIUTA?
MA È SEMPRE VERA E REVERSIBILE…….………..ANCHE NEL CASO DI MOVIMENTO?
LE IMMAGINI ENTRANO IN UNA NUOVA ERA….FINITE ELEMENT METHODS
….PROVIAMO AD ESSERE PIÙ SEMPLICI…..
FANTOCCI E DATI SPERIMENTALI VS. CLINICA REALE
COMPLEX CLINICAL CASES - RADIOSURGERY (AVMS CASES)
Imaging
Deformations
have some
challenges?
TOMOTHERAPY SKIN IRRADIATION
(E.G. HALF BODY IRRADIATION – TSI (TOTAL SKIN IRRADIATION)
Challenges:
•PTV Size (Very Thin Target (e.g. Skin)
•LIMITED FOV
Advantages with IGRT+Deformable Software: could be possible some tricks
Research in progress
Lung Dose Warping
(….possible but DVH Evaluation is not our goals or a good clinical parameter)…..
ORGAN MOTION DUE TO BREATHING PHASES
MIGHT HAVE MANY CHALLENGES
FUSION AND DOSE WARPING
ARE NOT PERFECT
Lung Deformable Vector Fields
Different Deformable options – Different results ….. Be careful, what you say to the doctors
LIMITED FOV
USE ALL BODY ANATOMY
FOCUS ON LUNG
FOCUS ON BONE STRUCTURES
DOSE WARPING – E.G. PAEDIATRIC PATIENTS
TBI DEFORMAZIONE IMMAGINE E STRUTTURE
(PROBLEMATICHE NASCOSTE E POSSIBILI ERRATE INTERPRETAZIONI
Posizionamento Differente
Deformazione immagine
(Possibile Artefatto!!)
Cavità aeree
(Possibile Artefatto!!)
PROSPETTIVE
IMAGING E FUSIONE APPLICATA AGLI STUDI DI BIOMECCANICA E ADAPTIVERT (ES. «PAROTIDI»)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
cm
N°CT
∆ Semilati delle parotidi a confronto
Parotide dx Parotide sx
SXDX
y = -0.01x
R² = 0.89
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
cm
N°CT
Parotide sx: ∆𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑖 = 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜 𝑛 − 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜1
y = -0.01x
R² = 0.95
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
cm
N°CT
Parotide dx: ∆𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑖= 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜 𝑛 − 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜1
• PAROTIDI….. DEFORMABLE REGISTRATION
• MANDIBOLA ….. RIGID REGISTRATION
OGNI ORGANO NECESSITA DI SPECIFICI PROCESSI
In-silico Medicine
8/24/2015 26
… MA ANCHE PATTERN GENETICI E/O FISIOLOGICI…..
……ANCHE PER QUESTI SARÀ NECESSARIA FUSIONE ED EVIDENCE?
«EVIDENCE»….NON TUTTO È ORO QUEL CHE LUCCICA…
CONCLUSIONI
…. PROVIAMO A CAPIRCI QUALCOSA, MA….
TEORIA VS. PRATICA VS. «EVIDENCE» ……. NON HO UNA RISPOSTA UNIVOCA!
8/24/2015 29
CONCLUSIONI..... OPEN DISCUSSION
“That’s too much!!!”
(Praha 2009 : Tomotherapy Meeting)
GRAZIE PER L’ATTENZIONE....
Gabriele Guidi
Medical Physics Dpt.
Az.Ospedaliero Universitaria di Modena
+39 059 422 5669
Guidi.Gabriele@policlinico.mo.it
LELE
BERTONI
Dedicata al maestro……….

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Processi e Software per la Fusione delle immagini

  • 1. Processi e Software per la Fusione delle immagini: “Evidence” e metodologie applicative Gabriele Guidi Medical Physics Dpt. Az.Ospedaliero Universitaria di Modena +39 059 422 5669 Guidi.Gabriele@policlinico.mo.it
  • 2. NO CONFLICTS OF INTEREST TO DISCLOSE Co-Funding: • Italian Ministry of Health (MoH2010, GR-2010-2318757) Dose warping methods for IGRT and Adaptive RT: dose accumulation based on organ motion and anatomical variations of the patients during radiation therapy treatments • Tecnologie Avanzate S.r.l. (Italy): Co-Partner of MoH2010, GR-2010-2318757
  • 3. QUANTE E QUALI IMMAGINI………. PER LA FUSIONE….. US CT
  • 4. ….DIFFERENZE TRA TEORIA E «EVIDENCE» «Evidence»……Appropriatezza, efficacia ed efficienza clinica Teoria, software e algoritmi….. Fisica, Matematica, Biologia, Genetica, Ingegneria…..
  • 5. RAZIONALE : IMAGING, PROCESSI ED EVIDENZE Image-Guided Radiation Therapy: A Refresher D.A. Jaffray, ASTRO 2012 Imaging and cancer: a review; Leonard Fassa . Molecular Oncology 2 (2008) QUALI TIPI DI IMMAGINI? QUALI VANTAGGI E SVANTAGGI? QUALI PROBLEMATICHE? QUALI PROCESSI ED EVIDENZE? PERCHÉ LA FUSIONE?
  • 6. QUALE ALGORITMO O SOFTWARE ? (…..dubitate di chi dichiara di avere il migliore……..)
  • 7. ….CORREVA L’ANNO 1998….. E SE NE PARLAVA…. Medical Image Analysis (1998) volume 2, number 1, pp 1–36 A survey of medical image registration J. B. Antoine Maintz∗ and Max A. Viergever Image Sciences Institute, Utrecht University Hospital, Utrecht, The Netherlands
  • 8. MATEMATICAMENTE……… SIETE SICURI DI AVERE UN MIGLIORE? Medical Dosimetry, vol. 33, no. 2, pp. 149-155, 2008 Multimodality image fusion and planning and dose Delivery for radiation therapy. Cheng B ALLINEAMENTO PERFETTO ALLINEAMENTO IMPERFETTO Robust Image Registration for improved clinical efficiency using local structure analysis and model-based processing Daniel Forsberg
  • 9. MATEMATICAMENTE……… SIETE SICURI DI TROVARE UN MIGLIORE? Image Fusion Medical image fusion: A survey of the state of the art Alex Pappachen James a,⇑, Belur V. Dasarathy b
  • 10. MATEMATICAMENTE……… SIETE SICURI DI TROVARE SEMPRE LA STESSA SOLUZIONE?
  • 11. 8/24/2015 11 …… PERCHÉ’ UTILIZZIAMO LA FUSIONE? Mesothelioma H-N Lymphoma Pancreas Prostate Radiosurgery Craniospinal PRATICA CLINICA … È UNA ROUTINE DI TUTTI I GIORNI Re-Irradiation Lung Total Lymphoid Irradiation Total Body Irradiation Lung - SBRT Bilateral BreastMultiple Lesions 1. Per la definizione del volume bersaglio? 2. Perché i trattamenti sono sempre più conformati? 3. Perché vogliamo fare AdaptiveRT? 4. Perché curiamo il setup del paziente? 5. Perché teniamo conto del movimento? 6. Perché meccanicamente o fisiologicamente il paziente assume condizioni particolari? 7. ……………
  • 12. 8/24/2015 12 Es. PET FUSION & CT EXHALE & CT INHALE …. PROBLEMI CELATI CHE LA FUSIONE POTREBBE FALSARE O RISOLVERE 4DCT vs. PET (GTV4D= Red Contour) 4DCT vs CT with Max Inhale (GTV Max Inhale=Yellow contour) 4DCT vs CT with Max Exhale (GTV Max Exhale Green Contour)
  • 13. QUANTE VARIABILI DI ERRORE E/O CO-REGISTRAZIONE ERRATA……..”EVIDENCE” (ES. ARTEFATTI DA MOVIMENTO, PROTESI, VARIAZIONI DOSIMETRICHE DA RESPIRO, LEMBI CHIRURGICI ESPIANTATI) Anatomy-Pathology exam before formalin Anatomy-Pathology exam after formalin
  • 14. ……….FORSE UN ERRORE CONCETTUALE……………? (LAVORARE IN 4D NECESSITA DI CONCETTI 4D…. LA FUSIONE È UNA COSA DIVERSA) 4DCT (Fase Specifica) 4DCT (Fusione)
  • 15. 8/24/2015 15 LA MATEMATICA E FISICA COMPLESSA CI AIUTA? MA È SEMPRE VERA E REVERSIBILE…….………..ANCHE NEL CASO DI MOVIMENTO?
  • 16. LE IMMAGINI ENTRANO IN UNA NUOVA ERA….FINITE ELEMENT METHODS
  • 17. ….PROVIAMO AD ESSERE PIÙ SEMPLICI….. FANTOCCI E DATI SPERIMENTALI VS. CLINICA REALE
  • 18. COMPLEX CLINICAL CASES - RADIOSURGERY (AVMS CASES) Imaging Deformations have some challenges?
  • 19. TOMOTHERAPY SKIN IRRADIATION (E.G. HALF BODY IRRADIATION – TSI (TOTAL SKIN IRRADIATION) Challenges: •PTV Size (Very Thin Target (e.g. Skin) •LIMITED FOV Advantages with IGRT+Deformable Software: could be possible some tricks Research in progress
  • 20. Lung Dose Warping (….possible but DVH Evaluation is not our goals or a good clinical parameter)….. ORGAN MOTION DUE TO BREATHING PHASES MIGHT HAVE MANY CHALLENGES FUSION AND DOSE WARPING ARE NOT PERFECT
  • 21. Lung Deformable Vector Fields Different Deformable options – Different results ….. Be careful, what you say to the doctors LIMITED FOV USE ALL BODY ANATOMY FOCUS ON LUNG FOCUS ON BONE STRUCTURES
  • 22. DOSE WARPING – E.G. PAEDIATRIC PATIENTS
  • 23. TBI DEFORMAZIONE IMMAGINE E STRUTTURE (PROBLEMATICHE NASCOSTE E POSSIBILI ERRATE INTERPRETAZIONI Posizionamento Differente Deformazione immagine (Possibile Artefatto!!) Cavità aeree (Possibile Artefatto!!)
  • 24. PROSPETTIVE IMAGING E FUSIONE APPLICATA AGLI STUDI DI BIOMECCANICA E ADAPTIVERT (ES. «PAROTIDI») 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 cm N°CT ∆ Semilati delle parotidi a confronto Parotide dx Parotide sx SXDX y = -0.01x R² = 0.89 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 cm N°CT Parotide sx: ∆𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑖 = 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜 𝑛 − 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜1 y = -0.01x R² = 0.95 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 cm N°CT Parotide dx: ∆𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑖= 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜 𝑛 − 𝑠𝑒𝑚𝑖𝑙𝑎𝑡𝑜1 • PAROTIDI….. DEFORMABLE REGISTRATION • MANDIBOLA ….. RIGID REGISTRATION OGNI ORGANO NECESSITA DI SPECIFICI PROCESSI
  • 26. 8/24/2015 26 … MA ANCHE PATTERN GENETICI E/O FISIOLOGICI….. ……ANCHE PER QUESTI SARÀ NECESSARIA FUSIONE ED EVIDENCE?
  • 27. «EVIDENCE»….NON TUTTO È ORO QUEL CHE LUCCICA…
  • 28. CONCLUSIONI …. PROVIAMO A CAPIRCI QUALCOSA, MA…. TEORIA VS. PRATICA VS. «EVIDENCE» ……. NON HO UNA RISPOSTA UNIVOCA!
  • 29. 8/24/2015 29 CONCLUSIONI..... OPEN DISCUSSION “That’s too much!!!” (Praha 2009 : Tomotherapy Meeting)
  • 30. GRAZIE PER L’ATTENZIONE.... Gabriele Guidi Medical Physics Dpt. Az.Ospedaliero Universitaria di Modena +39 059 422 5669 Guidi.Gabriele@policlinico.mo.it LELE BERTONI Dedicata al maestro……….

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