Comparison.of Bone Scan and SPECT/CT in detection of Condylar.Hyperplasia
Syed Muhammad Moeez Haider, Muhammad Numair Younis, Sheikh Danial Hanan, Rimsha Bader
189
ABSTRACT
Background: Condylar Hyperplasia is a pathology characterized
by. abnormal growth.
that causes.facial asymmetry. It is an excessive growth
of one or both mandibular condyles.that affects ramus,
body or neck of the mandible. It can eventually cause facial asymmetry,
malocclusion, speech .and masticatory .problems.
Aim: To find out the diagnostic efficacy. of Bone Scan and SPECT/CT. in detection of Condylar Hyperplasia.
Methods: 33 patients were selected based on the
inclusion criteria. Bone Scans were performed.
and dynamic study comprising Perfusion & Blood-pool phases were acquired
immediately. after intravenous injection
of 99Tcm_MDP. SPECT.and CT images were
obtained 3-6 hours after the injection.
Results: 14 patients (42.4%) were considered positive
on planar bone scan due to the hot spots (radiotracer uptake areas) around TMJ,
nose and mandibular region. Yet there was no evidence that these patients were
confirmed of the pathology. 3D multi slice imaging was required to confirm the
pathology. 10 patients (30.3%) were negative with no hot spots showed. 13
patients (27.3%) were remained suspected and required proper image
acquisitions. SPECT CT scans were performed and 28 patients (84.8%) were shown
negative. No hot spots shown on mandibular condyles and TMJ confirmed that
patients had not been detected of condylar hyperplasia. Only 5 patients (15.2%)
confirmed condylar hyperplasia with hot spots on condyles and temporomandibular
joint.
Conclusion: Planar bone scan did not effectively
separate mastoid, TM joint in 2D image due to these structures lies in close
proximity to each other. Planar bone scan was unable to localize the actual
sites of higher uptakes. On contrary SPECT CT had confirmed 5 patients with
positive uptake values and confirmed the presence of pathology. Due to multi
slice imaging acquisitions and detailed information regarding radiotracer
activity, distribution and localization, SPECT CT showed better visualization
of the structures and provided better understanding of the pathology.
Keywords: Condylar Hyperplasia,
Planar Bone Scan, SPECT CT
ABSTRACT
Background: Condylar Hyperplasia is a pathology characterized
by. abnormal growth.
that causes.facial asymmetry. It is an excessive growth
of one or both mandibular condyles.that affects ramus,
body or neck of the mandible. It can eventually cause facial asymmetry,
malocclusion, speech .and masticatory .problems.
Aim: To find out the diagnostic efficacy. of Bone Scan and SPECT/CT. in detection of Condylar Hyperplasia.
Methods: 33 patients were selected based on the
inclusion criteria. Bone Scans were performed.
and dynamic study comprising Perfusion & Blood-pool phases were acquired
immediately. after intravenous injection
of 99Tcm_MDP. SPECT.and CT images were
obtained 3-6 hours after the injection.
Results: 14 patients (42.4%) were considered positive
on planar bone scan due to the hot spots (radiotracer uptake areas) around TMJ,
nose and mandibular region. Yet there was no evidence that these patients were
confirmed of the pathology. 3D multi slice imaging was required to confirm the
pathology. 10 patients (30.3%) were negative with no hot spots showed. 13
patients (27.3%) were remained suspected and required proper image
acquisitions. SPECT CT scans were performed and 28 patients (84.8%) were shown
negative. No hot spots shown on mandibular condyles and TMJ confirmed that
patients had not been detected of condylar hyperplasia. Only 5 patients (15.2%)
confirmed condylar hyperplasia with hot spots on condyles and temporomandibular
joint.
Conclusion: Planar bone scan did not effectively
separate mastoid, TM joint in 2D image due to these structures lies in close
proximity to each other. Planar bone scan was unable to localize the actual
sites of higher uptakes. On contrary SPECT CT had confirmed 5 patients with
positive uptake values and confirmed the presence of pathology. Due to multi
slice imaging acquisitions and detailed information regarding radiotracer
activity, distribution and localization, SPECT CT showed better visualization
of the structures and provided better understanding of the pathology.
Keywords: Condylar Hyperplasia,
Planar Bone Scan, SPECT CT