Spinal stenosis is a prevalent diagnosis, which is handled in a heterogeneous manner by clinicians. Moreover, when using steroidal epidural injections, successful treatment is currently defined as the satisfaction of the patient from the treatments, a subjective and non-quantifiable indicator.

In this experiment, the investigators aim to evaluate thermographic images as an objective method for assessing the efficacy of steroidal epidural injections, the most common invasive treatment for pain associated with spinal stenosis

Inclusion Criteria:

• Signed a valid, IRB/EC-approved informed consent form
• 18 years of age or older when written informed consent is obtained
• Diagnosis of spinal stenosis by MRI or CT imaging

Exclusion Criteria:

• Sensitivity to local anesthetics
• Skin infection at the site of needle insertion
• Had evidence of a peripheral neuropathy
• Had clinical signs of peripheral vascular disease
• Patient is pregnant
• Clinical diagnosis of blood clotting disorder
• Tumor or infection at spine as demonstrate at MRI Unbalanced Cardiac Insufficiency, hypertension & Diabetes cataract Stomach Ulcer