Bedside ultrasound by the healthcare professional has revolutionized patient care worldwide, providing clinicians with immediate answers to clinical questions and guiding procedures safely.This monograph represents a concise guide to thoracic ultrasound for any clinician who is managing a patient in a clinical setting and helps answer specific questions about diagnosis and common disease processes.A case study is integrated in this monograph allowing the adoption of lung and pleuroparietal ultrasound, as an extension of the clinical examination, a means available at the patient's bed, non expensive and non irradiating, in the clinical reasoning of the patient.This monograph is dedicated to all specialties that take care of a patient in a clinical setting: (pneumology, internal medicine, emergency, resuscitation, cardiology)