Add additional debugging information to the database class

Since there have been many bug reports about incorrectly imported
dicom files, these statements will help us zero in on issue
more efficiently during development.

Libs/DICOM/Core/ctkDICOMDatabase.cpp

@@ -709,6 +709,7 @@ void ctkDICOMDatabasePrivate::insertStudy(const ctkDICOMDataset& ctkDataset, int
   checkStudyExistsQuery.exec();
   if(!checkStudyExistsQuery.next())
     {
+      qDebug() << "Need to insert new study: " << studyInstanceUID;
 
       QString studyID(ctkDataset.GetElementAsString(DCM_StudyID) );
       QString studyDate(ctkDataset.GetElementAsString(DCM_StudyDate) );
@@ -741,7 +742,10 @@ void ctkDICOMDatabasePrivate::insertStudy(const ctkDICOMDataset& ctkDataset, int
         {
           LastStudyInstanceUID = studyInstanceUID;
         }
-
+    }
+  else
+    {
+    qDebug() << "Used existing study: " << studyInstanceUID;
     }
 }
 
@@ -756,6 +760,8 @@ void ctkDICOMDatabasePrivate::insertSeries(const ctkDICOMDataset& ctkDataset, QS
   loggedExec(checkSeriesExistsQuery);
   if(!checkSeriesExistsQuery.next())
     {
+      qDebug() << "Need to insert new series: " << seriesInstanceUID;
+
       QString seriesDate(ctkDataset.GetElementAsString(DCM_SeriesDate) );
       QString seriesTime(ctkDataset.GetElementAsString(DCM_SeriesTime) );
       QString seriesDescription(ctkDataset.GetElementAsString(DCM_SeriesDescription) );
@@ -795,6 +801,10 @@ void ctkDICOMDatabasePrivate::insertSeries(const ctkDICOMDataset& ctkDataset, QS
           LastSeriesInstanceUID = seriesInstanceUID;
         }
     }
+  else
+    {
+    qDebug() << "Used existing series: " << seriesInstanceUID;
+    }
 }
 
 //------------------------------------------------------------------------------
@@ -859,12 +869,6 @@ void ctkDICOMDatabasePrivate::insert( const ctkDICOMDataset& ctkDataset, const Q
       return;
     }
 
-
-
-
-
-
-
   // store the file if the database is not in memomry
   // TODO: if we are called from insert(file) we
   // have to do something else
@@ -987,6 +991,10 @@ void ctkDICOMDatabasePrivate::insert( const ctkDICOMDataset& ctkDataset, const Q
           emit q->databaseChanged();
         }
     }
+  else
+    {
+    qDebug() << "No patient name or no patient id - not inserting!";
+    }
 }
 
 //------------------------------------------------------------------------------