The Bat-Signal first appeared in Detective Comics #60 (February 1942). The signal has several different origins in comics featuring post- Crisis continuity. It is introduced as a new tool after Batman's first encounter with the Joker in the 2005 series Batman: The Man Who Laughs, and also during the 1990 " Prey" storyline in Legends of the Dark Knight. Slater A, Goodwin M, Anderson KE, Gleeson FV. COPD can mimic the appearance of pneumothorax on thoracic ultrasound. (2006) Chest. 129 (3): 545-50. doi:10.1378/chest.129.3.545 - Pubmed Lichtenstein D, Mezière G. A lung ultrasound sign allowing bedside distinction between pulmonary edema and COPD: the comet-tail artifact. (1998) Intensive care medicine. 24 (12): 1331-4. Pubmed As the amount of effusion increases, the curtain progressively covers less and less of the diaphragm, uncovering it even at inspiration. With massive effusion, the dynamic component is also lost.

Lung ultrasound in the critically ill | Annals of Intensive Lung ultrasound in the critically ill | Annals of Intensive

The transducer of choice would be a low-frequency curvilinear transducer. Some clinicians also report using a phased array transducer. You may also use a high-frequency linear transducer to assess the chest wall, pleura, or subpleural lesions. The high-frequency transducer is not ideal for imaging deeper structures or evaluating A-lines and B-lines beyond a certain depth from the skin surface. McGonigal MD, Schwab CW, Kauder DR, Miller WT, Grumbach K: Supplemented emergent chest CT in the management of blunt torso trauma. J Trauma 1990, 30: 1431–1435. 10.1097/00005373-199012000-00001In Tim Burton's 1989 film Batman, Batman gives the signal to the police as a gift so that they can summon him when he is needed after he defeats The Joker. The Bat-Signal as it appears in the 1989 film Batman

BAT Careers. Be the change. Do Something Brilliant. BAT Careers. Be the change. Do Something Brilliant.

Lichtenstein D, Mezière G, Lagoueyte JF, Biderman P, Goldstein I, Gepner A: A-lines and B-lines: lung ultrasound as a bedside tool for predicting pulmonary artery occlusion pressure in the critically ill. Chest 2009, 136: 1014–1020. 10.1378/chest.09-0001 In Schumacher's 1997 film Batman & Robin, Poison Ivy alters the Bat-Signal by changing it to a "Robin-Signal" to lure Robin into a trap.

POCUS Lung – Introduction to A-lines and B-lines

Gargani L, Lionetti V, Di Cristofano C, et al.: Early detection of acute lung injury uncoupled to hypoxemia in pigs using ultrasound lung comets. Crit Care Med 2007, 35: 2769–2774. 10.1097/01.CCM.0000287525.03140.3F In Joel Schumacher's 1995 sequel Batman Forever, the criminal psychologist Dr. Chase Meridian uses the Bat-Signal to call Batman, to seduce him. Batman is slightly peeved at this: "The Bat-Signal is not a beeper". Later, the Riddler alters the Bat-Signal by projecting a question mark into the sky with the Bat-symbol forming the dot at the base. (The Riddler in the comics uses a similar tactic in Batman: Dark Victory; after brokering a tentative alliance with Batman, the Riddler changes the signal, projecting a question mark into the sky to let Batman know that he has an answer for him). A music video for " Kiss from a Rose", also from Batman Forever, features singer Seal performing the song while standing near the Bat-Signal. In the finale of the fourth season, " A Dark Knight: No Man's Land", James Gordon has Lucius Fox activate the Floodlight on top of the G.C.P.D building. After the episode, Gordon tells Bruce Wayne that the signal is meant to be a symbol of hope, while both are looking up at the clouds illuminated by the Floodlight.