diff --git a/Packages/ohif-measurements/client/conformance/CriteriaEvaluator.js b/Packages/ohif-measurements/client/conformance/CriteriaEvaluator.js
index 7c1469395..1cba204c1 100644
--- a/Packages/ohif-measurements/client/conformance/CriteriaEvaluator.js
+++ b/Packages/ohif-measurements/client/conformance/CriteriaEvaluator.js
@@ -8,14 +8,20 @@ export class CriteriaEvaluator {
 
         _.each(criteriaObject, (optionsObject, criterionkey) => {
             const Criterion = Criteria[`${criterionkey}Criterion`];
-            if (optionsObject instanceof Array) {
-                _.each(optionsObject, options => {
-                    const criterion = new Criterion(options);
-                    this.criteria.push(criterion);
-                });
-            } else {
-                this.criteria.push(new Criterion(optionsObject));
-            }
+            const optionsArray = optionsObject instanceof Array ? optionsObject : [optionsObject];
+            _.each(optionsArray, options => {
+                const validator = Criteria[`${criterionkey}Validator`];
+                if (!validator(options)) {
+                    let message = `Invalid ${criterionkey}Criterion definition.`;
+                    _.each(validator.errors, error => {
+                        message += `\noptions${error.dataPath} ${error.message}`;
+                    });
+                    throw new Error(message);
+                }
+
+                const criterion = new Criterion(options);
+                this.criteria.push(criterion);
+            });
         });
     }
 
diff --git a/Packages/ohif-measurements/client/conformance/criteria/MaxTargets.js b/Packages/ohif-measurements/client/conformance/criteria/MaxTargets.js
index 42617f297..885e87d44 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/MaxTargets.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/MaxTargets.js
@@ -1,7 +1,8 @@
 import { BaseCriterion } from './BaseCriterion';
 import { _ } from 'meteor/underscore';
+import Ajv from 'ajv';
 
-export const MaxTargetsSchema = {
+export const MaxTargetsValidator = new Ajv().compile({
     properties: {
         limit: {
             label: 'Max targets allowed in study',
@@ -10,7 +11,7 @@ export const MaxTargetsSchema = {
         }
     },
     required: ['limit']
-};
+});
 
 /* MaxTargetsCriterion
  *   Check if the number of target measurements exceeded the limit allowed
diff --git a/Packages/ohif-measurements/client/conformance/criteria/MaxTargetsPerOrgan.js b/Packages/ohif-measurements/client/conformance/criteria/MaxTargetsPerOrgan.js
index b05e82078..da66955b4 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/MaxTargetsPerOrgan.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/MaxTargetsPerOrgan.js
@@ -1,6 +1,7 @@
 import { BaseCriterion } from './BaseCriterion';
+import Ajv from 'ajv';
 
-export const MaxTargetsPerOrganSchema = {
+export const MaxTargetsPerOrganValidator = new Ajv().compile({
     properties: {
         limit: {
             label: 'Max targets allowed per organ',
@@ -9,7 +10,7 @@ export const MaxTargetsPerOrganSchema = {
         }
     },
     required: ['limit']
-};
+});
 
 /*
  * MaxTargetsPerOrganCriterion
diff --git a/Packages/ohif-measurements/client/conformance/criteria/MeasurementsLength.js b/Packages/ohif-measurements/client/conformance/criteria/MeasurementsLength.js
index 170aa1d37..7c94ca816 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/MeasurementsLength.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/MeasurementsLength.js
@@ -1,6 +1,7 @@
 import { BaseCriterion } from './BaseCriterion';
+import Ajv from 'ajv';
 
-export const MeasurementsLengthSchema = {
+export const MeasurementsLengthValidator = new Ajv().compile({
     properties: {
         longAxis: {
             label: 'Minimum length of long axis',
@@ -63,17 +64,17 @@ export const MeasurementsLengthSchema = {
             type: 'string'
         }
     },
-    oneOf: [
+    anyOf: [
         { required: ['message', 'longAxis'] },
         { required: ['message', 'shortAxis'] },
         { required: ['message', 'longAxisSliceThicknessMultiplier'] },
         { required: ['message', 'shortAxisSliceThicknessMultiplier'] }
     ]
-};
+});
 
 /*
  * MeasurementsLengthCriterion
- *   Check the measurements of all bidirectional tools based on 
+ *   Check the measurements of all bidirectional tools based on
  *   short axis, long axis, modalities, location and slice thickness
  * Options:
  *   longAxis: Minimum length of long axis
diff --git a/Packages/ohif-measurements/client/conformance/criteria/Modality.js b/Packages/ohif-measurements/client/conformance/criteria/Modality.js
index 0eb667dcd..53d692325 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/Modality.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/Modality.js
@@ -1,11 +1,13 @@
 import { BaseCriterion } from './BaseCriterion';
 import { _ } from 'meteor/underscore';
+import Ajv from 'ajv';
 
-export const ModalitySchema = {
+export const ModalityValidator = new Ajv().compile({
     properties: {
         method: {
-            label: 'Specify if it\'s goinig to "allow" or "restrict" the modalities',
-            type: 'string'
+            label: 'Specify if it\'s goinig to "allow" or "deny" the modalities',
+            type: 'string',
+            enum: ['allow', 'deny']
         },
         measurementTypes: {
             label: 'List of measurement types that will be evaluated',
@@ -17,7 +19,7 @@ export const ModalitySchema = {
             uniqueItems: true
         },
         modalities: {
-            label: 'List of allowed/restricted modalities',
+            label: 'List of allowed/denied modalities',
             type: 'array',
             items: {
                 type: 'string'
@@ -27,15 +29,15 @@ export const ModalitySchema = {
         }
     },
     required: ['method', 'modalities']
-};
+});
 
 /*
  * ModalityCriteria
- *   Check if a modality is allowed or restricted
+ *   Check if a modality is allowed or denied
  * Options:
- *   method (string): Specify if it\'s goinig to "allow" or "restrict" the modalities
+ *   method (string): Specify if it\'s goinig to "allow" or "deny" the modalities
  *   measurementTypes (string[]): List of measurement types that will be evaluated
- *   modalities (string[]): List of allowed/restricted modalities
+ *   modalities (string[]): List of allowed/denied modalities
  */
 export class ModalityCriterion extends BaseCriterion {
 
@@ -60,7 +62,7 @@ export class ModalityCriterion extends BaseCriterion {
                 const modality = metadata.modality.toUpperCase();
 
                 if (((validationMethod === 'allow') && !modalitiesSet.has(modality)) ||
-                    ((validationMethod === 'restrict') && modalitiesSet.has(modality))) {
+                    ((validationMethod === 'deny') && modalitiesSet.has(modality))) {
                     measurements.push(measurement);
                     invalidModalities.push(modality);
                 }
diff --git a/Packages/ohif-measurements/client/conformance/criteria/NonTargetResponse.js b/Packages/ohif-measurements/client/conformance/criteria/NonTargetResponse.js
index 29378de90..bc716f707 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/NonTargetResponse.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/NonTargetResponse.js
@@ -1,7 +1,8 @@
 import { BaseCriterion } from './BaseCriterion';
+import Ajv from 'ajv';
 
-export const NonTargetResponseSchema = {
-};
+export const NonTargetResponseValidator = new Ajv().compile({
+});
 
 /* NonTargetResponseCriterion
  *   Check if the there are non-target measurements with response different than "present" on baseline
diff --git a/Packages/ohif-measurements/client/conformance/criteria/TargetType.js b/Packages/ohif-measurements/client/conformance/criteria/TargetType.js
index 40f227572..fbcbe0362 100644
--- a/Packages/ohif-measurements/client/conformance/criteria/TargetType.js
+++ b/Packages/ohif-measurements/client/conformance/criteria/TargetType.js
@@ -1,7 +1,8 @@
 import { BaseCriterion } from './BaseCriterion';
+import Ajv from 'ajv';
 
-export const TargetTypeSchema = {
-};
+export const TargetTypeValidator = new Ajv().compile({
+});
 
 /* TargetTypeCriterion
  *   Check if the there are non-bidirectional target measurements on baseline