mri of acute abdominal pain in pregnancy...mri of acute abdominal pain in pregnancy ivan pedrosa,...
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MRI of Acute Abdominal Pain in Pregnancy
I v a n Pe d ro s a , M . D.C h i e f o f M R I
J a c k R ey n o l d s M D C h a i r i n R a d i o l o g yA s s o c i a t e P ro f e s s o r o f R a d i o l o g yU T S o u t h we s t e r n M e d i c a l C e n t e r
A d v a n c e d I m a g i n g R e s e a rc h C e n t e rWednesday, October 3, 2012
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NON SURGICALLigamentous Laxity
Hemorrhagic Corpus Luteum
Degenerating Fibroids
GU tract
GI tract
SURGICALAcute Appendicitis
Ectopic Pregnancy
Ovarian TorsionWednesday, October 3, 2012
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Location of the Appendix
Baer et al. JAMA 1932
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Location of the Appendix
Baer et al. JAMA 1932 Pedrosa et al. Radiology 2006Oto et al. AJR 2006
Spearman Rank Correlation:0.44 (P-value: 0.003)
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Location of the Appendix
C
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Tilting of the Cecum
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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Tilting of the Cecum
α
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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Tilting of the Cecum
α
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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Tilting of the Cecum
α
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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Tilting of the Cecum
α
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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Tilting of the Cecum
α
specificity 98%
Lee K. et al. Radiology 2008Wednesday, October 3, 2012
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MRI Protocol
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MRI ProtocolUS prior to MRI
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MRI ProtocolUS prior to MRI
1.5T (No 3T)
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MRI ProtocolUS prior to MRI
1.5T (No 3T)
No Gadolinium
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MRI ProtocolUS prior to MRI
1.5T (No 3T)
No Gadolinium
Supine, Phase Array Body Coil
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MRI ProtocolUS prior to MRI
1.5T (No 3T)
No Gadolinium
Supine, Phase Array Body Coil
Oral prep (1.5 hours)450 mL Gastromark (Mallinckrodt Medical Inc., St. Louis, MO)[iron oxide]
300 mL Readi-cat 2 (EZEM Canada Inc., Westbury, NY)[barium sulfate]
Liebig, T et al. Mag Reson Med 1993
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MRI ProtocolUS prior to MRI
1.5T (No 3T)
No Gadolinium
Supine, Phase Array Body Coil
Oral prep (1.5 hours)450 mL Gastromark (Mallinckrodt Medical Inc., St. Louis, MO)[iron oxide]
300 mL Readi-cat 2 (EZEM Canada Inc., Westbury, NY)[barium sulfate]
Liebig, T et al. Mag Reson Med 1993
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MRI Protocol
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T2W SSFSE / HASTE (T2-WI)AxialCoronalSagittal
MRI Protocol
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T2W SSFSE / HASTE (T2-WI)AxialCoronalSagittal
Axial T2W Fat-Sat SSFSE / HASTE
MRI Protocol
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T2W SSFSE / HASTE (T2-WI)AxialCoronalSagittal
Axial T2W Fat-Sat SSFSE / HASTEAxial 2D T2* TOF
MRI Protocol
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T2W SSFSE / HASTE (T2-WI)AxialCoronalSagittal
Axial T2W Fat-Sat SSFSE / HASTEAxial 2D T2* TOFAxial T1W GRE in- and out-of-phase
MRI Protocol
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T2W SSFSE / HASTE (T2-WI)AxialCoronalSagittal
Axial T2W Fat-Sat SSFSE / HASTEAxial 2D T2* TOFAxial T1W GRE in- and out-of-phaseAxial DWI (b=850)
MRI Protocol
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Normal Appendix
Collapsed Intraluminal AirWednesday, October 3, 2012
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Normal Appendix
Collapsed Intraluminal AirWednesday, October 3, 2012
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Normal Appendix
Collapsed Intraluminal AirWednesday, October 3, 2012
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Is the Appendix Obstructed?
Normal/Abnormal? AppendicitisNormal
T2-W SSFSE Bailey et al. Applied Radiology 2012Wednesday, October 3, 2012
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
Blooming Effect = Intraluminal AirWednesday, October 3, 2012
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
Blooming Effect = Intraluminal AirWednesday, October 3, 2012
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Air-Filled Appendix
T2W SSFSE (spin echo) TOF (GRE)
Blooming Effect = Intraluminal AirWednesday, October 3, 2012
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Appendix vs. Gonadal Varices
SSFSE
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Appendix vs. Gonadal Varices
SSFSE
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TOF
Appendix vs. Gonadal Varices
SSFSE
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TOF
Appendix vs. Gonadal Varices
SSFSE
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TOF
Appendix vs. Gonadal Varices
SSFSE
Intraluminal Air (Blooming)Collapsed (intermediate signal)
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Appendicitis: MR Criteria
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Appendicitis: MR Criteria
NormalDiameter ≤ 6 mmAir in its lumen (blooming effect on T2* TOF)
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Appendicitis: MR Criteria
NormalDiameter ≤ 6 mmAir in its lumen (blooming effect on T2* TOF)
AbnormalDiameter > 7 mmFluid-filled lumenPeriappendiceal fat strandingRLQ abscess/phlegmon
Wednesday, October 3, 2012
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Appendicitis: MR Criteria
NormalDiameter ≤ 6 mmAir in its lumen (blooming effect on T2* TOF)
AbnormalDiameter > 7 mmFluid-filled lumenPeriappendiceal fat strandingRLQ abscess/phlegmon
InconclusiveDiameter between 6-7 mm without ancillary findings
Wednesday, October 3, 2012
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Mild Appendicitis
Wednesday, October 3, 2012
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Mild Appendicitis
Wednesday, October 3, 2012
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Mild Appendicitis
Wednesday, October 3, 2012
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Mild Appendicitis
Wednesday, October 3, 2012
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Appendicitis + Appendicolith
Wednesday, October 3, 2012
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Appendicitis + Appendicolith
Wednesday, October 3, 2012
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Appendicitis + Appendicolith
Wednesday, October 3, 2012
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Appendicitis + Appendicolith
Wednesday, October 3, 2012
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Appendicitis + Appendicolith
Wednesday, October 3, 2012
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Suppurative Appendicitis
Wednesday, October 3, 2012
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Suppurative Appendicitis
Wednesday, October 3, 2012
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Suppurative Appendicitis
Wednesday, October 3, 2012
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Suppurative Appendicitis
Wednesday, October 3, 2012
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Fat Saturation in Mild Acute Appendicitis
SSFSE SSFSE + FSWednesday, October 3, 2012
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Fat Saturation in Mild Acute Appendicitis
SSFSE SSFSE + FSWednesday, October 3, 2012
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Fat Saturation in Mild Acute Appendicitis
SSFSE SSFSE + FSWednesday, October 3, 2012
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Fat Saturation in Mild Acute Appendicitis
SSFSE SSFSE + FSWednesday, October 3, 2012
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Fat Saturation in Mild Acute Appendicitis
SSFSE SSFSE + FSWednesday, October 3, 2012
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Appendiceal Phlegmon
27 wks
Wednesday, October 3, 2012
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Appendiceal Phlegmon
27 wks
C
Wednesday, October 3, 2012
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Appendiceal Phlegmon
27 wks
C
Wednesday, October 3, 2012
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Appendiceal Phlegmon
32 wks27 wks
C
Wednesday, October 3, 2012
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Appendiceal Phlegmon
32 wks27 wks
C
Wednesday, October 3, 2012
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Appendiceal Phlegmon
32 wks27 wks
C
Wednesday, October 3, 2012
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DWI in Appendicitis
SSFSE DWI (b=1000)Wednesday, October 3, 2012
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DWI in Appendicitis
SSFSE DWI (b=1000)Wednesday, October 3, 2012
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DWI in Appendicitis
SSFSE DWI (b=1000)Wednesday, October 3, 2012
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DWI in Appendicitis
SSFSE DWI (b=1000) FusedWednesday, October 3, 2012
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Inconclusive Result
Wednesday, October 3, 2012
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Inconclusive Result
Wednesday, October 3, 2012
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Inconclusive Result
Wednesday, October 3, 2012
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Initial Experience
Wednesday, October 3, 2012
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Initial Experience
Prospective diagnosis (51 pts): 4 TP, 3FP, 0 FN, 44 TN
Pedrosa I et al. Radiology 2006Wednesday, October 3, 2012
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Initial Experience
Prospective diagnosis (51 pts): 4 TP, 3FP, 0 FN, 44 TN
Sensitivity 100%, NPV 100%
Pedrosa I et al. Radiology 2006Wednesday, October 3, 2012
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Initial Experience
Prospective diagnosis (51 pts): 4 TP, 3FP, 0 FN, 44 TN
Sensitivity 100%, NPV 100%
1 CT / 51 patients to confirm tip appendicitis
Pedrosa I et al. Radiology 2006Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
MR → normal appendix seen:
Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
MR → normal appendix seen:
89% (20/23) Oto et al. Radiology 2005
Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
MR → normal appendix seen:
89% (20/23) Oto et al. Radiology 2005
87% (116/134) Pedrosa et al. Radiology 2009
Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
MR → normal appendix seen:
89% (20/23) Oto et al. Radiology 2005
87% (116/134) Pedrosa et al. Radiology 2009
US → normal appendix typically not seenNegative Result = Ambiguous result
Wednesday, October 3, 2012
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“Ruling-out” Acute Appendicitis
MR → normal appendix seen:
89% (20/23) Oto et al. Radiology 2005
87% (116/134) Pedrosa et al. Radiology 2009
US → normal appendix typically not seenNegative Result = Ambiguous result
Do we need an US?
Wednesday, October 3, 2012
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Surgical Conditions
Ectopic Pregnancy
Ovarian Torsion
Wednesday, October 3, 2012
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Ovarian Torsion
MR Findings
Tubal thickening
Ovarian enlargement
Hyperintense ovarian stroma on T2-W (probably related to edema)
Ghossain MA et al. JMRI 2004
Swirled vascular pedicle
Wednesday, October 3, 2012
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Ovarian Torsion
Wednesday, October 3, 2012
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Ovarian Torsion
Wednesday, October 3, 2012
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Ovarian Torsion
Wednesday, October 3, 2012
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Ovarian Torsion
Wednesday, October 3, 2012
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Hemorrhagic Corpus Luteum
Degenerated Fibroids
GU tract pathology
GI tract pathology
Right ovarian vein varices
Non-Surgical Conditions
Wednesday, October 3, 2012
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Fibroid degeneration
T2-WI T1-WIWednesday, October 3, 2012
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Fibroid degeneration
T2-WI T1-WIWednesday, October 3, 2012
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Fibroid degeneration
T2-WI T1-WIWednesday, October 3, 2012
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T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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DWI (b=850)
T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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DWI (b=850)
T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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DWI (b=850)
T2W SSFSE
DWI in Fibroid degeneration
Wednesday, October 3, 2012
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Hydronephrosis
Pregnancy hydronephrosis
Passed Ureteral StoneRoy C. Magn Reson Imaging 1995
Wednesday, October 3, 2012
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Hydronephrosis
Pregnancy hydronephrosis
Passed Ureteral StoneRoy C. Magn Reson Imaging 1995
Wednesday, October 3, 2012
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Hydronephrosis
Pregnancy hydronephrosis
Passed Ureteral StoneRoy C. Magn Reson Imaging 1995
Wednesday, October 3, 2012
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Hydronephrosis
Pregnancy hydronephrosis
Passed Ureteral StoneRoy C. Magn Reson Imaging 1995
Wednesday, October 3, 2012
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Hydronephrosis
Pregnancy hydronephrosis
Passed Ureteral StoneRoy C. Magn Reson Imaging 1995
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Ureteral StoneWednesday, October 3, 2012
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Ureteral StoneWednesday, October 3, 2012
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Ureteral StoneWednesday, October 3, 2012
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Ureteral Stone Pseudo-stoneWednesday, October 3, 2012
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Ureteral Stone Pseudo-stoneWednesday, October 3, 2012
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Ureteral Stone Pseudo-stoneWednesday, October 3, 2012
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Ureteral Stone Pseudo-stoneWednesday, October 3, 2012
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Ureteral Stone
B
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Ureteral Stone
B
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Ureteral Stone
B
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Fat Sat SSFSE
Ureteral Stone
B
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Fat Sat SSFSE
Ureteral Stone
B
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Fat Sat SSFSE
3D FIESTA
Ureteral Stone
B
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Fat Sat SSFSE
3D FIESTA
Ureteral Stone
B
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Fat Sat SSFSE
3D FIESTA
Ureteral Stone
B
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Pyelonephritis
T2 FSE FS
Dipstick Urinanalysis: -Wednesday, October 3, 2012
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Pyelonephritis
T2 FSE FS
Dipstick Urinanalysis: -Wednesday, October 3, 2012
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Pyelonephritis
T2 FSE FS DWI (b=1000)
Dipstick Urinanalysis: -Wednesday, October 3, 2012
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Pyelonephritis
T2 FSE FS DWI (b=1000)
Dipstick Urinanalysis: -Wednesday, October 3, 2012
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Pyelonephritis
T2 FSE FS DWI (b=1000)
Dipstick Urinanalysis: -Wednesday, October 3, 2012
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Pyelonephritis
T2 FSE FS DWI (b=1000)
Dipstick Urinanalysis: - Final culture: Gram +Wednesday, October 3, 2012
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Clinical Outcomes (2002-07)
148 ptsAll
patientsEstimated
(MRI negative) Literature
Negative Laparotomy
Rate30% 7% 20-52%
Perforation Rate
21% 21% 55%
Pedrosa et al. Radiology 2009
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Conclusion
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Dx of Surgical and Non-surgical dz
Conclusion
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Dx of Surgical and Non-surgical dz
Anatomic changes in right colon
Conclusion
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Dx of Surgical and Non-surgical dz
Anatomic changes in right colon
MRI Protocol - short but comprehensive
Conclusion
Wednesday, October 3, 2012
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Dx of Surgical and Non-surgical dz
Anatomic changes in right colon
MRI Protocol - short but comprehensive
MRI findings in acute appy, other GI dz, ovarian torsion, degenerating fibroids, ureteral stone vs pregnancy-hydro
Conclusion
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[email protected] Wednesday, October 3, 2012